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PLOS One logoLink to PLOS One
. 2024 Apr 26;19(4):e0289391. doi: 10.1371/journal.pone.0289391

Energy drinks in Tamale: Understanding youth perceptions, consumption patterns, and related factors

Williams Kobik 1,*,#, Paul Armah Aryee 2,#
Editor: Zakari Ali3
PMCID: PMC11051681  PMID: 38669248

Abstract

Energy drinks (EDs) have become a popular choice for young people seeking physical and cognitive boosts, with ingredients such as caffeine, taurine, and B vitamins aimed at improving academic, athletic, and alertness levels. However, the popularity of these drinks is also driven by low prices, taste, brand loyalty, and gendered marketing, with boys being more likely to consume them. Despite the supposed benefits, EDs have been associated with high-risk behaviours, deaths, and adverse health effects, especially those related to cardiovascular risk. Meanwhile, in Ghana, the use of EDs is on the rise. Hence, this study aimed to examine the prevalence and consumption patterns, perceptions, and factors associated with ED consumption among the youth of the Tamale Metropolis. The study was cross-sectional, consisting of 541 participants. The group consisted of 340 males and 201 females, between the ages of 15 and 45. A questionnaire was utilized to obtain data on the respondents’ consumption patterns and perceptions of EDs, as well as their socio-demographic characteristics. The results of the study indicated that a large percentage of the respondents, 98.7%, had consumed EDs before, while 78.7% currently consume them. Respondents believed that EDs provided additional energy (81.00%) and reduced stress (62.30%). However, they also perceived side effects such as insomnia (60.60%) and restlessness (51.40%). Also, the highest proportion of respondents (83.4%) had poor knowledge of EDs. They were unaware of the classification of EDs and their ingredients, side effects, and benefits. Age, marital status, level of education, work intensity, EDs served at gatherings, and knowledge of EDs was significantly associated with ED consumption (p < .05). Consumption was higher among those aged 26 to 35 years, singles, individuals with no formal education, and those with high work intensity. The high consumption was also associated with low knowledge levels. It is recommended that public health and nutrition professionals engage in further advocacy efforts to improve the youth’s knowledge and perception of EDs in a positive manner. In addition, lawmakers should use legislation to influence consumption rates and safeguard the health of consumers.

Introduction

Throughout history, humans have sought physical and cognitive enhancements to tackle challenging tasks [1]. Conveniently, Energy Drink (ED) marketing strategies are centered around physical boosts and improved cognitive performance [2]. Thus, there has been a significant increase in consumption among young people [3]. Ingredients commonly found in EDs include caffeine, guarana, ginseng, taurine, glucose, L-carnitine, glucuronolactone, and B vitamins [4]. Despite their perceived benefits, factors such as low cost, taste, brand loyalty, and gendered marketing have contributed to their popularity. Notably, marketing campaigns geared towards masculinity have resulted in fewer girls consuming EDs than boys [5, 6]. Over the course of history, sports have served as a domain where masculinity is learned, demonstrated, and perpetuated [7]. Indeed, since their inception in 1987, the marketing of these products has heavily depended on visuals linked with extreme sports and risk-taking behaviours [8, 9].

The ED market is one of the fastest-growing segments of the non-alcoholic beverage industry. Despite the notoriety of Eds for being high in sugar and caffeine, their dangers have been largely overlooked. Meanwhile, the European Union has stated that there is no evidence to support the argument that EDs pose a degree of toxicity to the extent of adverse health outcomes. However, case reports from around the world suggest otherwise [1012].

EDs have not only been associated with negative health effects and death but have also been linked to high-risk substance use and social deviance such as vandalism and reckless driving, resulting in accidents [4, 1315]. Acute effects include sudden cardiac death, high blood pressure, and endothelial dysfunction, which can affect young people and those with underlying cardiovascular conditions. The usual ingredients found in EDs, including guarana, ginseng, taurine, and caffeine, have been associated with a range of adverse health outcomes [16]. Also consuming excessive sugar commonly found in EDs, contributes to overnutrition [17].

In the specific context of Ghana, a nation within a sub-region grappling with an uptrend in diet-related diseases [18], there has been a discernible uptick in ED consumption [19]. A survey revealed that 62% of student-athletes consume at least one can of ED per week [20]. This may be the result of the unregulated sale and use of EDs in Ghana. Compared to some developed countries such as France, Denmark, and Norway, EDs with high levels of caffeine and taurine have been banned, such restrictions are absent in Ghana. In some other countries, it is required that EDs be sold as medicinal products or with warning labels [19, 20].

This study builds upon existing research on ED consumption in Ghana, expanding beyond previous investigations that predominantly focused on specific cohorts like students, student-athletes, and drivers [1924]. However, they have left a gap in our understanding of ED consumption among the general youth population. This study addresses this gap by examining ED consumption among a representative sample of Ghanaian youth.

The overall aim of this study was to evaluate the youth’s perceptions, consumption habits, and factors linked with ED consumption in the Tamale Metropolis.

This study enhances our understanding of ED consumption habits among the youth in the Tamale Metropolis. The findings can raise awareness, prompt further research in this domain, and influence policy and public health initiatives.

Methods

Study design

The study design was a descriptive cross-sectional. This approach was primarily selected for its suitability in capturing a snapshot of the population’s characteristics and behaviours at a specific point in time. This design was deemed appropriate for the research objectives. It allowed for a comprehensive examination of ED consumption patterns among the study participants within the defined timeframe. The reasons for utilizing a descriptive cross-sectional design lie in its efficiency in providing a quick and cost-effective overview of the prevalence and distribution of the studied variables. This approach facilitates the identification of trends, making it particularly valuable for investigating the current landscape of ED consumption in the target population. Additionally, the design enables the simultaneous assessment of multiple factors, contributing to a holistic understanding of ED consumption within the constraints of a singular data collection period.

Study area

With a population of about 360,579, the Tamale Metropolis is located in the Northern Region. Of this, 80.8% reside in urban areas. The metropolis spans 289.58 square miles [25]. EDs are readily available through convenience shops and street vendors, and the area has a fast-growing business landscape where the trading of EDs thrives. Below is a map of the metropolis extracted from Google Maps (Fig 1).

Fig 1. Map of Tamale (Coordinates: 9.404601, -0.842389).

Fig 1

Study site

The data were collected in the central business district of the metropolis.

Study population

The focus of this research was on individuals aged 15 to 45 years old. The demographic aged 15 to 45 comprises approximately 63.3% of the population engaged in economic activities which demonstrates financial capability for purchasing EDs [25]. This group, primarily consisting of teenagers and young adults, holds specific beliefs about the perceived advantages of these beverages, influencing their decision to consume them. Given that individuals in this age range are actively exposed to marketing and advertising for EDs and are still in the process of developing their health habits, understanding their consumption patterns is crucial. The engagement of adolescents and young adults in sports, extracurricular activities, and social events further underscores the relevance of comprehending the factors influencing their ED consumption. This knowledge is pivotal for promoting healthy behaviors and mitigating potential health risks associated with their perceptions of ED benefits.

Inclusion and exclusion criteria

The participants for this study were required to fall within the age range of 15 to 45 years and also be permanent residents of the Tamale metropolis. To verify residency, respondents were asked if they had lived in the metropolis for a minimum of five years. These criteria were set to ensure that the data collected was representative of the local population within this age bracket and who have had adequate exposure to the city’s environment and social dynamics.

Sample size determination

The total population of youth (n) for this study, 383 was determined using Cochran’s formula. The confidence interval was set at 95% with the z-score (t) being 1.96. The margin of error (m) was 0.05 and the prevalence of ED consumption (p) was estimated to be 46.7% [21].

Sampling technique

The Tamale Metropolis was purposively chosen as the study location, and respondents were selected for convenience. Specifically, study participants were chosen based on their presence in the central business district of the metropolis. Although convenience sampling was used to select participants, the process depended on the established inclusion and exclusion criteria.

Data collection and quality management

The study collected data on individual respondents through semi-structured interviews. The questionnaire was pretested and then administered via face-to-face interviews with the aid of a Computer Assisted Personal Interview (CAPI) device. The questionnaire was divided into four sections to cover demographic information, anthropometry, and perception of EDs. In terms of demographic information, the study gathered data on respondents’ age, gender, marital status, ethnicity, religion, employment status, work intensity, educational level, and smoking and drinking behaviours. Anthropometric measurements included height and weight parameters. The perception section of the questionnaire probed respondents’ knowledge of EDs, exploring factors such as awareness, attitudes, and beliefs. It sought to probe respondents’ understanding of EDs, including their ingredients, brands, benefits, and adverse effects. Based on the responses, a score was generated, and respondents’ knowledge of EDs was eventually categorized as "poor," "good," or "excellent." The response scales and metrics used in the perception section were Likert, multi-choice, and frequency scales. The study employed a combination of closed-ended questions with predefined response options, as well as open-ended questions to capture a comprehensive understanding of respondents’ perceptions regarding EDs. Additionally, the data was collected by enumerators who received a one-day training on questionnaire administration and translation into the local dialect.

Data analysis

The collected data was transferred from the Kobo toolbox on mobile phones to Excel for cleaning and then to IBM Statistical Package for Social Sciences (SPSS version 21) for analysis. The consumption patterns of EDs were analyzed using frequencies and percentages. For continuous data, correlations, means, and standard deviations were used. The relationship between exposure variables such as demographics, perceptions and consumption patterns was examined using Chi-square tests.

The data gathered explored respondents’ socio-demographic characteristics, knowledge, attitudes, and practices regarding EDs. Analysis was done using various statistical tests, including T-tests, chi-square tests, Pearson’s r correlation, and logistic regression, with a significance level of 0.05.

Ethical considerations

The study followed ethical guidelines and obtained ethical approval from the Committee on Human Research and Publication Ethics (CHRPE) with Ref No: CHRPE/AP/256/22. Consent was obtained orally. The decision to obtain oral consent in this research on ED consumption was meticulously considered, factoring in ethical principles and practical considerations specific to the study. Participants were easily accessible in the central business district of the metropolis, facilitating efficient oral consent acquisition during brief interactions. The research, focusing on surveying participants about their ED consumption habits, presented minimal risk to the health of individuals. Given the impracticality of obtaining written consent from a sizable participant pool, oral consent emerged as a more practical alternative, streamlining the consent process. Before data collection, informed consent was obtained from all participants, emphasizing their voluntary participation and the confidentiality of their information. Participants were provided with clear explanations regarding the purpose, procedures, and potential risks and benefits associated with the study. They were also assured of their right to withdraw from the study at any point without repercussions. To uphold privacy and confidentiality, personal identifiers were removed from the collected data, and data storage followed secure protocols. Only authorized researchers had access to the data, maintaining strict confidentiality throughout the study.

Results

Socio-demographic characteristics of youth

The respondents had a mean age of 25.55 (SD = 8.11) years, with the majority (59.7%) falling in the 15–25 age range. Most respondents were male (62.8%), single (70.6%), practicing Islam (66.0%), and from the Dagomba ethnic group (55.1%). Around 44% of respondents were students, and a significant proportion had formal education. The majority (65.2%) engaged in labor-intensive work. An independent samples T-test revealed significant age differences between males and females (t (366.66) = -2.04, p < .001), with females (M = 36.51, SD = 8.92) being older than males (M = 24.98, SD = 7.55). However, there were no significant BMI differences between genders (t (539) = 1.623, p = .105). The chi-square test examined associations between gender and general characteristics. Marital status did not differ significantly by gender (X2(4, N = 541) = 4.67, p > 0.05). However, there were significant gender differences in the frequency of ED consumption (X2(1, N = 525) = 7.36, p = .007) and mixing EDs with other substances (X2(1, N = 413) = 10.65, p = .001). Employment status showed no significant gender differences (X2(3, N = 541) = 5.11, p = .164), but work intensity had a significant relationship with gender (X2(1, N = 541) = 8.01, p = .005). The level of education did not differ significantly between males and females (X2(4, N = 541) = 2.21, p = .697). Alcohol consumption was significantly higher among males than females (X2(1, N = 541) = 36.94, p < .001), and there were no female smokers (X2(1, N = 541) = 14.83, p < .001) (Table 1).

Table 1. Socio-demographic characteristics of sampled youth of Tamale.

Variable Total (541) Male (340) Female (201) P-value
Age (yrs.), n(%) .021
15–25 323 (59.70) 213 (39.40) 110 (20.30)
26–35 128 (23.70) 82 (15.20) 46 (8.50)
36–45 90 (16.60) 45 (8.30) 45 (8.30)
Age, mean (SD) 25.55 (8.11) 24.98 (7.55) 36.51 (8.92) .034
Weight, mean (SD) 61.65 (9.08) 63.69 (8.31) 58.3532 (9.39) < .001
Height, mean (SD) 1.64 (.10) 1.66 (0.11) 1.6019 (.07) < .001
BMI, mean (SD) 23.19 (3.86) 23.40 (3.85) 22.8418 (3.86) .105
Marital status, n(%) .335
Never Married 382 (70.61) 249 (73.20) 133 (66.20)
Married/Cohabiting 141 (26.06) 82 (24.10) 59 (29.40)
Separated 8 (1.48) 5 (1.50) 3 (1.50)
Divorced 2 (.37) 1 (.30) 1 (.50)
Widowed 8 (1.48) 3 (.90) 5 (2.50)
Ethnicity, n(%) .001
Dagomba 298 (55.10) 211 (39.0) 87 (16.10)
Others 243 (44.90) 129 (23.8) 114 (21.10)
Religion, n(%) .059
Christianity 181 (33.50) 100 (18.50) 81 (15.00)
Islam 357 (66.00) 238 (44.00) 119 (22.00)
Traditional 3 (.50) 2 (.40) 1 (.10)
Employment status, n(%) .164
Student 228 (42.10) 134 (39.40) 94 (46.80)
Unemployed 49 (9.10) 28 (8.20) 21 (10.40)
Self-employed 143 (26.40) 99 (29.10) 44 (21.90)
Employed 121 (22.40) 79 (23.20) 42 (20.90)
Work intensity, n(%) .005
Yes 353 (65.20) 237 (69.70) 116 (57.50)
No 188 (34.80) 103 (30.30) 85 (42.30)
Education level, n(%) .697
None 44 (8.10) 29 (8.50) 15 (7.50)
Primary 28 (5.20) 19 (5.60) 9 (4.50)
JHS 80 (14.80) 49 (14.40) 31 (15.40)
Secondary/vocational 184 (34.00) 121 (35.60) 63 (31.30)
Tertiary 205 (37.90) 122 (35.90) 83 (41.30)
Alcohol intake, n(%) < .001
Yes 90 (16.60) 82 (24.10) 8 (4.00)
No 451 (83.40) 258 (75.90) 193 (96.00)
Smoking, n(%) < .001
Yes 24 (4.40) 24 (4.40) 0 (.00)
No 517 (95.60) 316 (92.90) 201 (100.00)

The prevalence of ED consumption

Fig 1 illustrates that 98.7% of youth in Tamale have ever consumed an ED, and 78.7% of them are current consumers (Fig 2).

Fig 2. Prevalence of ED consumption.

Fig 2

Consumption pattern of EDs

The analysis of the data revealed that the highest frequency of ED consumption among the study sample was weekly (70.9%), with smaller proportions consuming daily (36.9%) or monthly (2.2%) (Table 2). The majority of consumers (93.9%) consumed one bottle per sitting, while smaller proportions consumed two (4.1%), three (1.2%), or four (0.7%) bottles/cans. The evening was the preferred time for consumption (55.0%), and most consumers (62.0%) had been consuming EDs for 2 to 3 years without a specific reason (Table 2). Fig 3 shows that the primary reasons for consuming EDs were to reduce stress and tiredness (60.3%), followed by seeking an energy boost (34.1%) and the desire to stay awake (29.5%). Smaller proportions mentioned other reasons such as increasing concentration, boosting appetite, refreshment, pain relief, sexual endurance, aiding digestion, seeking a high, enjoying the taste, and facilitating weight loss. Only 31.26% of respondents encountered EDs at social gatherings. The majority encountered them at weddings (50.3%), while 39.4% encountered them at outdoor events, and a smaller proportion encountered them at parties (Figs 4 and 5). Among the respondents, 25.9% experienced side effects. Insomnia was the most commonly reported side effect (55.1%), followed by post-consumption fatigue (18.1%), palpitations (16.8%), and restlessness (13.1%) (Figs 6 and 7).

Table 2. Consumption pattern among the youth in Tamale.

Variable Frequency (n) Percentage (%)
Frequency of ED consumption
Daily 111 26.90
Weekly 293 70.90
Monthly 9 2.20
Number of bottles drank per sitting
One 388 93.90
Two 17 4.10
Three 5 1.20
Four 3 0.70
Duration since consumption commenced
One year and below 46 11.10
2 to 3 years 256 62.00
4 years and above 11 26.90
Preferred time of consumption
Morning 31 7.50
Afternoon 155 37.50
Evening/ night 227 55.00
Reason for preferred time for consumption
Energy boost for work or studies 83 20.10
To relax or refreshment 32 7.70
No reason 119 28.80
Manage fatigue and stress 76 18.50
Keep awake and concentrate 56 13.60
Craving 27 6.50
For its effects to dissipate by a certain time 20 4.80

Fig 3. Reasons for ED consumption.

Fig 3

Fig 4. The proportion of ED sightings at social gatherings.

Fig 4

Fig 5. Social gatherings where EDs have been sighted.

Fig 5

Fig 6. The proportion of ED users who have experienced side effects.

Fig 6

Fig 7. Side effects experienced by ED users.

Fig 7

Knowledge and perception of ED consumption

Almost all of the respondents had heard about EDs (97.8%). The source of their information on EDs mainly came from Television (87.3%), friends (83.2%), the internet (51.6%), and radio (41.4%). With regards to known ingredients used for manufacturing EDs, Caffeine (76.4%), Taurine (24.6%), Guarana (24.4%), and sugar (38.4%) were considerably well known compared to others like ginseng (3.6%), and vitamins (5.1%). The most popular brand was Rush (93.2%) (Table 3). The most perceived benefit of taking EDs was to provide extra energy (81.0%). A greater proportion (81%) of the respondents perceived that the benefit of EDs is to get extra energy and about sixty-two per cent perceive stress reduction as a benefit. About sixty-one per cent of the sample perceived that the adverse effect of EDs is insomnia (Table 3). The highest proportion of respondents (83.4%) had poor knowledge of EDs. A comparatively smaller proportion had good and excellent knowledge of EDs (15.7% and .9% respectively) (Fig 8).

Table 3. Knowledge and perception of the sample on ED consumption.

Variable Frequency (n) Percentage (%)
Ever Heard of Eds
Yes 529 97.80
No 12 2.20
Heard About EDs Through
Television 462 87.30
Radio 219 41.40
Internet/social media 273 51.60
Friends 440 83.20
Billboard 11 2.10
Known ED Ingredients
Guarana 129 24.40
Taurine 130 24.60
Salt 24 4.50
Caffeine 404 76.40
Water 326 61.60
Sugar 203 38.40
Ginseng 19 3.60
Color 6 1.10
Flavor 20 3.80
Vitamins 27 5.10
Alcohol 45 8.50
Acid 19 3.50
Known ED Brands
Storm 468 88.10
5-Star 472 88.90
Rush 495 93.20
Burn 37 6.80
Red Bull 46 8.70
Blue Jeans 119 22.40
Tamarinda 1 .20
Power Up 5 .90
Explode 10 1.90
Rox 53 10.00
Passion 12 2.30
Easy Sport 123 23.20
Run 146 27.30
Lucozade 31 5.80
Vim 56 10.40
10–10 66 12.20
Boss 16 3.00
Vody 26 4.90
Bullet 17 3.20
Next Level 12 2.30
Perceived ED Benefits
Increase work/study concentration 106 20.00
Give extra energy 430 81.00
Boost Appetite 61 11.50
Reduce stress 331 62.30
Nutrient source 1 .20
Prevents malaria 1 .20
Reduce or manage hunger 1 .20
High 1 .20
Pain killer 5 .90
Sexual stamina 5 .90
Aid digestion 2 .40
Increase work rate 1 .20
Lose weight 2 .40
Keep awake 48 9.00
Refreshment 4 .80
Perceived Side Effects of Eds
Insomnia 322 60.60
Drowsiness 59 11.10
Restlessness 273 51.40
Headache 105 19.80
Addiction 20 3.80

Fig 8. Knowledge level of respondents.

Fig 8

Relationship between ED use and socio-demographic characteristics

An independent samples T-test revealed that consumers (M = 24.4, SD = 7.6) were generally younger than non-consumers (M = 29.5, SD = 8.6), t(160.79) = -5.64, p < .001. The Chi-square analysis indicated that the proportion of ED consumers decreased across different age categories: 264 (83.8%), 102 (82.9%), and 47 (54%) for the age groups 15–25, 26–35, and 36–45, respectively. Notably, each age group had a higher proportion of consumers compared to non-consumers, and the youngest age category (15–25) exhibited the highest proportion of users. These frequency differences were statistically significant, X2(2, N = 525) = 37.8, p < .001. The Chi-square test indicated a significantly higher proportion of male consumers (66.6%) compared to female consumers (33.4%), X2(1, N = 525) = 7.36, p = .007. Educational level was also found to be significantly associated with consumption, X2(4, N = 525) = 19.14, p = .001. Additionally, respondents with high work intensity were more likely to consume EDs, X2(1, N = 525) = 24.03, p < .001. Although there was no significant association between consumption and alcohol intake, X2(1, N = 525) = 1.299, p = .254, a significant association was found between consumption and smoking, X2(1, N = 525) = 6.196, p = .013. Non-smokers (96.6%) had a considerably higher proportion of consumers compared to smokers (3.4%) (Table 4).

Table 4. Association between ED use and socio-demography.

Variables ED consumption, Yes (N = 413) ED consumption, No (N = 112) P-value
Age, mean (SD) 24.41 (7.62) 29.47 (8.64) < .001
Age Categorized, n (%) < .001
15–25 264 (63.90) 51 (45.50)
26–35 102 (24.70) 21 (18.80)
36–45 47 (11.40) 40 (35.70)
Gender (M/F), n (%) .007
Male 275 (66.60) 59 (52.70)
Female 138 (33.40) 53 (57.30)
Educational level, n (%) .001
None 36 (8.70) 8 (7.10)
Primary 25 (6.10) 2 (1.80)
JHS 66 (16.00) 12 (10.70)
Secondary/vocational 151 (36.60) 29 (25.90)
Tertiary 135 (32.70) 61 (45.50)
Work type, n (%) .066
Employed 85 (20.60) 33 (29.50)
Self-employed 111 (26.90) 28 (25.00)
Unemployed 32 (7.70) 13 (11.60)
Student 185 (44.80) 38 (33.90)
Work intensity, n (%) < .001
Yes 294 (71.20) 42 (46.40)
No 119 (28.80) 60 (53.60)
Alcohol intake, n (%) .254
Yes 66 (16.00) 23 (20.50)
No 347 (84.00) 89 (79.50)
Smokers, n (%) .013
Yes 14 (3.40) 10 (8.90)
No 399 (96.60) 102 (91.10)

Risk factors related to ED consumption

A logistic regression analysis was conducted to examine the predictive value of various factors, including age, gender, marital status, education level, work intensity, alcohol intake, smoking, BMI, ED consumption at social gatherings, and knowledge of EDs, on the likelihood of consuming EDs. The logistic regression model yielded significant results, X2(23, N = 525) = 149.17, p < .001. The model accounted for 24.7% (Cox & Snell R2) to 38.3% (Nagelkerke R2) of the variance in consumption and accurately classified 83.0% of cases. Table 5 demonstrates that marital status, education level, work intensity, servings at gatherings, and knowledge level of EDs significantly contributed to the model.

Table 5. Logistic regression predicting the likelihood of ED consumption.

Variables OR 95% C.I. P-value
Lower Upper
Age in categories 15–25 1 .002
26–35 .359 .159 .814 .014
36–45 1.515 .578 3.975 .398
Gender Male 1
Female 1.652 .951 2.869 .075
Marital status Single 1 .043
Married .872 .392 1.942 .738
Separated 12.626 2.001 79.644 .007
Divorced .925 .003 319.780 .979
Widowed 3.208 .354 29.027 .300
Education level None 1 .001
Primary .465 .075 2.890 .411
JHS 1.069 .287 3.979 .921
SHS/ vocational .993 .316 3.124 .991
Tertiary 3.634 1.175 11.237 .025
Type of work Employed 1 .220
Self-employed 1.624 .747 3.532 .221
Unemployed 1.130 .398 3.208 .818
Student .700 .329 1.490 .355
Work intensity Yes 1
No 3.692 2.055 6.634 < .001
Alcohol intake Yes 1
No .835 .387 1.802 .646
Smoking Yes 1
No .672 .192 2.359 .535
BMI categories Underweight 1 .941
Normal .713 .242 2.098 .539
Overweight .696 .206 2.356 .560
Obese .730 .183 2.910 .655
EDs served at gatherings Yes 1
No .160 .092 .277 < .001
Knowledge level Low knowledge 1 .010
Good knowledge 2.714 1.378 5.348 .004
Excellent knowledge 4.295 .467 39.493 .198

Regarding specific variables, individuals in the 26–35 age group had 0.359 times lower odds of not consuming EDs compared to those in the 15–25 age group (p = .014, 95% CI .159, .814). On the other hand, individuals in the 36–45 age group had 1.515 times higher odds of not consuming EDs than those in the 15–25 age group (p = .398, 95% CI .578, 3.975). Separated individuals had 12.626 times greater odds of not consuming EDs compared to singles (p = .007, 95% CI 2.001, 79.644). Furthermore, tertiary-educated individuals had 3.634 times higher odds of not consuming EDs than those without formal education (p = .025, 95% CI 1.175, 11.237). Individuals with low work intensity had 3.692 times higher odds of not consuming EDs compared to those with high work intensity (p < .001, 95% CI 2.055, 6.634). Moreover, the likelihood of consuming EDs was 84% higher when consumed privately compared to being served at public gatherings (p < .001, 95% CI .092, .277). Additionally, individuals with good knowledge of EDs were 2.714 times more likely to not consume EDs than those with poor knowledge (p = .004, 95% CI 1.375, 5.348). However, the 36–45 age category, gender, marital status (married, divorced, widowed), work type, alcohol intake, smoking, BMI, and excellent knowledge of EDs did not have a significant impact on the model (Table 5).

Discussion

EDs are gaining popularity, but studies have linked them to harmful effects. Despite this, more people are consuming them for various reasons. Given the lack of policies in Ghana and the aggressive marketing by ED companies, it is crucial to understand consumption patterns and predictors. This knowledge can help inform policies and educational efforts by public health professionals to address this growing phenomenon. Hence, this study aims to evaluate the youth’s perceptions, consumption habits, and factors linked with ED consumption in the Tamale Metropolis.

Knowledge

According to this research, a high percentage of the study population is aware of EDs, consistent with other studies [19, 26]. The perceived benefits of these drinks align with their advertised effects, suggesting strong marketing efforts. However, negative effects are often learned through personal experiences rather than advertising. Therefore, obtaining information from friends and relatives can have a more positive impact on decisions about ED consumption compared to direct advertising. Other studies have also shown the influence of friends, family, and advertisements on awareness of EDs, but the nature of this influence (positive or negative) remains undetermined [19, 27]. Increased brand awareness is a result of the multifaceted media channels employed for the promotion of EDs. Producers of EDs commit substantial resources to advertising and promotional strategies encompassing television broadcasts, public signage, posters, and sponsorship initiatives [6, 22, 28, 29]. Also, the significance of social factors, like friends, family, and advertising, in shaping both awareness and consumption patterns cannot be overstated. Within the framework of the Health Belief Model (HBM) [30], this underscores the pivotal role of social influences, acknowledging their impact on interpersonal relationships and, consequently, health-related decision-making processes.

This study found that the popularity of EDs is highly driven by advertising media, especially television. In support of this assertion, Stacey et al. [31] substantiated a correlation between the consumption of EDs and the exposure to promotional advertisements of ED brands. These advertisements were found to typically target a youthful male audience using sports and entertainment-centered themes [32], and leveraging associations with influential celebrities. Gendered advertising reflects the leveraging of higher involvement of males in sports. This is in line with an American study that strongly links ED consumption to traditional masculinity and risk-taking tendencies [33].

According to a study by Coso et al. [34], the most common ingredients found in EDs, comprising over 50% of the content, are caffeine, vitamin B6, sodium, niacin, and vitamin B12. Caffeine is the most well-known ingredient, with 76.4% awareness among consumers. However, there is a contrast in awareness of other ingredients such as taurine (24.6%), sugar (38.4%), and guarana when compared to similar studies [26]. The popularity of caffeine awareness can be attributed to its prominent marketing as a key ingredient in EDs. Lesser-known ingredients are not heavily marketed and may be too technical for consumers to be concerned about. This indicates that consumers of processed products, including EDs, prioritize the perceived or real benefits of the product rather than paying attention to its specific contents. Individuals may not fully understand the information provided on ED labels or simply place a high level of trust in the producers.

Rush, 5-Star, and Storm are the most popular ED brands in the Tamale Metropolitan area, with high levels of popularity ranging from 88.1% to 93.2%. In contrast to this study, prior research conducted in Ghana has yielded dissimilar results, with the most frequently consumed ED brands being identified as Blue Jeans, Lucozade, Rox, Monster, and Red Bull [20, 21]. The variation in popularity could be influenced by factors such as economic and demographic conditions, product effectiveness, taste, and availability [32, 35]. Therefore, marketing efforts, affordability, and favourable taste of Rush, 5-Star, and Storm brands likely contribute to their popularity in the Tamale Metropolitan area, especially among the youth who prefer these drinks over more expensive premium brands like Red Bull and Blue Jeans.

EDs are perceived to have several benefits, including increased alertness, improved work or study concentration, energy boost, stress management, and promotion of health and social relationships [15]. This study aligns with previous research [22, 27, 36, 37], indicating a prevailing belief in the benefits of EDs, with the highest perceived advantages being increased work or study concentration (20%), energy boost (81%), and stress management (62.3%). Also, this study reported perceived adverse effects including insomnia (60.60%), and restlessness (51.40%) as commonly reported adverse effects of EDs, similar to work by Casuccio et al. [26]. While perception is known to be autonomous concerning thought, knowledge may lead to an intentional intervention in the process of achieving a percept [38]. This suggests that perceptions may be influenced by external factors, notably well-targeted advertisements and recommendations from friends and family. Understanding these external influences is crucial for devising effective health communication strategies and interventions to promote informed and balanced perspectives on ED consumption.

Further, upon analyzing the data, it is evident that a large proportion of the sample population in this study has poor knowledge of EDs, accounting for 83.4%. This trend is consistent with another study that also reported a high rate of poor knowledge among participants [19]. The implication of low knowledge is that it can result in a high prevalence of ED use. Therefore, it is crucial to address issues of misconceptions and lack of knowledge. For instance, information about the adverse effects of EDs can be incorporated into default marketing strategies. Also, the lack of warning labels and inadequate inclusion of risks and side effects in advertisements and messaging contribute to this poor knowledge [19, 32, 39].

Attitude and practice

In Denmark and other places, consumption prevalence among young adults is low (15.8%) due to these products being relatively new and more expensive, compared to other soft drinks [33, 40]. Conversely consumption of EDs is high (78.7%) among the youth in Tamale. This finding aligns with studies conducted in Sicily among adults (78%), Ho, Ghana among commercial drivers (75%) and student-athletes in Ghana (62%) [19, 20, 26]. Moreover, an even higher percentage of individuals have ever tried EDs, with nearly the entire study population (98.7%) reporting consumption at some point. This trend is also consistent with studies conducted among adolescents in Shanghai, China (70.5%) and in Ho (85.6%) [19, 41]. The high prevalence of ever-consuming EDs is attributed to factors such as curiosity and perceived utility [24, 36]. Their increasing popularity is also attributed to various factors, including individual factors such as perceived benefits, targeted marketing strategies, and limited knowledge about these beverages [21, 32, 42]. Additionally, interpersonal factors like peer pressure, social image, and parental influence also play a role, along with environmental factors such as affordability, availability, and the lack of policies and regulations [41]. In the context of the health belief model (HBM) [30], these external factors serve as triggers of ED consumption. They can significantly impact individuals’ decision to consume EDs. Therefore, such channels of influence must be monitored to ensure that the general public is well-informed to make healthy choices. ED consumption among Ghanaian youth is concerning due to its potential health risks [43]. These drinks have high levels of caffeine and sugar, which can cause cardiovascular and neurological issues and contribute to weight gain, obesity, and dental problems [16, 4448]. Therefore, there is the need to place more emphasis on the need to address the health implications of ED consumption, particularly for the youth.

The main reasons for consuming EDs reported by the respondents were performance enhancement, stress management, energy boost, and increased work or study concentration. In similar studies conducted among drivers, students and athletes, it was reported that EDs were used to manage fatigue, stay awake, and concentrate for extended periods [19, 4951]. Many ED users appreciate their ability to reduce sleep hours, enhance concentration, boost energy, and serve as refreshments. Particularly, workers use EDs to enhance performance in the workplace, while students use them to cope with academic pressure [19, 50, 51]. Also, withdrawal symptoms have been reported by ED consumers after the effects wore off. Such an outcome potentially leads to dependence and workplace accidents–a risk to users and others [52, 53]. However, non-users tend to avoid them due to awareness of potential side effects [22]. This aligns with the HBM [30] consideration of perceived benefits for users and an understanding of perceived susceptibility and severity for non-users. A sub-group of ED users in this study reported mixing water with EDs to reduce their effects. This is a positive health behavior that demonstrates responsible consumption and reflects the perceived control over their actions. Adverse effects experienced by consumers included abdominal pain, chest pain, fatigue, constipation, insomnia, palpitations, diuresis, and muscle weakness. Although a wide range of adverse reactions have been reported by ED users, a small proportion experience side effects according to this study. This is possibly due to responsible consumption patterns within the sample population. Compared to the perceived benefits highlighted by the HBM [30], the adverse effects and the influence of personal experiences, also reveal potential barriers to ED consumption.

EDs are particularly popular among young individuals, especially those in their early twenties [32, 36, 54]. This can be attributed to the energy-demanding nature of that age group [55]. Young people’s curiosity [56] and inclination to follow trends also contribute to their higher consumption of EDs compared to older individuals [43]. Additionally, males generally consume EDs more frequently, particularly at night, and experience more side effects. This aligns with the marketing strategies of EDs, which often target young males and emphasize activities associated with youth and masculinity, such as sports [6, 31, 36, 54, 57, 58].

Education level is associated with ED use [26, 59]. Accordingly, ED consumption is higher among those with low education levels, and people who work or study long hours [19]. Education has an effect on lifestyle choices and awareness which reflects in consumption patterns. Individuals with a higher work intensity are more likely to consume EDs as a coping strategy against increasing demands. This supports the notion that activities like work and academics influence calorie intake and, consequently, ED consumption [26, 59, 60]. Intense work is typically characterized by physically demanding tasks, long work hours, and limited breaks. Individuals engaged in intense work or educational activities find EDs to be a convenient way to boost energy without interrupting their work for a meal. Moreover, while EDs may impact energy levels, they may not provide sufficient nutritional value and satiety. Their consumption may also lead to decreased reliance on natural foods and inadequate rest management [61]. Variables such as age, gender, education level, and work intensity, are factors that influence patterns of ED consumption. This aligns with the HBM [30], where the acknowledgement of modifying variables is pivotal in comprehending their role in shaping health-related behaviors.

According to this study, smokers make up a small proportion of ED consumers. The lack of association between alcohol consumption and ED use is attributed to taste preferences and concerns about the impact of combining the two for performance [62]–one of the primary reasons for consuming EDs among the participants in this study. Similar to previous studies by Casuccio et al. [26] and Chang et al. [15], no significant associations were found between ED use and these variables. Furthermore, this study revealed that easy access to EDs corresponds to higher consumption rates. EDs are readily available and easily accessible [63] to children and young adults, with numerous brands found in every shop that sells beverages [47, 64]. Additionally, there is a lack of government regulations governing the sale and marketing of EDs. This unrestricted promotion and utilization of EDs contributes to their increasing appeal, popularity, and availability [5]. The knowledge, experience of side effects or benefits also plays a role in influencing the use of EDs [64] Knowledge about EDs tends to increase with age [65]. And this reflects in the likelihood of ED consumption with increasing age [26, 66, 67]. With age individuals become more conscious of their health. This is because they generally do not believe in the durability of their bodies compared to younger people.

Among the participants in this study, a high proportion (70.9%) consumed EDs weekly. A smaller percentage consumed them daily (26.9%) or monthly (2.2%). In contrast, a study by Subaiea et al. [32] found a higher proportion of monthly consumers and fewer weekly and daily consumers. However, there are differences in the age range and age distribution between the two studies, which may explain the variation in consumption frequency patterns. Other studies have reported that most consumers tend to consume EDs weekly and have one drink per day [49, 58, 68].

Interestingly, the majority of consumers in this study started consuming EDs within the past 2 to 3 years. This coincides with the introduction of new and affordable ED brands in the Ghanaian market, suggesting that these factors contribute to the increasing popularity of EDs. The frequency of consumption is also influenced by the relatively low price of EDs, which makes them easily accessible to individuals with lower purchasing power [5, 69].

While another study suggests that ED consumers do not have a preferred time of consumption, the participants in this study showed a tendency to consume EDs in the evenings or at night [32]. This finding aligns with the study conducted by Chang et al. [15], where more than half of the consumers reported consuming EDs at night. This preference for evening consumption may be related to specific usage patterns, particularly among those who utilize them for studies, staying awake, or managing stress and fatigue. Consumers are less likely to consume EDs in the morning when they are already rested and do not require an energy boost. However, consumption rates tend to increase in the afternoon when workers start to feel tired from their morning activities [19].

ED consumption has been associated with smoking, alcohol intake, cannabis, medical drugs, and opioid use in previous studies [59, 70]. However, EDs pose risks to mental health, cardiovascular health, dental health, metabolic health, and social well-being [59, 7072]. While another study has reported an association between ED use and alcohol intake [62, 73], this study’s results align with a study by Peacock et al. [54]. It found that there is no significant association between ED use, smoking and alcohol consumption. However, this study’s population consists of few alcohol users and smokers likely due to the strong religious affiliations among the participants. This reflects on the habit of mixing EDs with other substances. The majority of users and non-users of EDs do not support the idea of mixing them with other substances, as supported by the study conducted by Chang et al. [15]. When it comes to mixing EDs with other substances, consumption at social gatherings is implicated in the promotion of such behavior compared to consumption at home [74]. While this study agrees with Casuccio et al. [26] that public places and events may not greatly influence ED consumption, other studies indicate that attention must be invested in those influencers [2, 75].

According to the findings of this study, individuals experience various side effects when the effects of EDs wear off. These side effects include insomnia, fatigue, palpitations, restlessness, headaches, stomach aches, drowsiness, menstrual cramps, and nausea. It is worth noting that these results differ slightly from a previous study conducted by Subaiea et al. [32], which examined the consumption patterns of EDs among the Saudi population. The variation in reported side effects may be attributed to the different brands of EDs consumed by each population.

Predictors of ED consumption

The findings of this study show certain factors may influence ED consumption. Consistent with the findings of other studies [7678], age is a significant predictor of ED consumption. For those in the younger age groups, consumption can be associated with developmental influences on consumption behaviors such as curiosity, addiction, peer influence, high perception of their body’s durability, or low health consciousness. In the older age group, consumption indicates shifts in preferences or lifestyle factors as individuals enter adulthood, greater purchasing power, increased dependence on external sources of energy, and increased energy demands. However, generally, ED consumption decreases with increasing age [40, 79, 80]. Marital status is a predictor of ED consumption as well [81]. This appears to be the case because relationships with people play a key role in aspects of lifestyle and decision-making. By extension, it impacts nutrition and health-seeking behavior. Individuals with different marital statuses might have distinct motivations for consuming EDs, influenced by factors such as social norms, stress levels, marital conflicts, the stress of a failed marriage and other marriage dynamics. Therefore, it is not out of place that the findings of this study have revealed marital status to be a factor that influences consumption. The intensity or perceived intensity of work done by an individual inadvertently causes the need for more energy to complete tasks, especially for those in the blue-collar job bracket. This is in line with this study’s findings that indicate that people who perceive their work to be low in intensity are less likely to consume EDs. Meanwhile, another study conducted among adolescents contradicts this finding by reporting that ED consumption is highest among those who are less physically active [40]. The difference may be a result of a difference in culture and the way adolescents are raised as well as the span of age categories covered in both studies. Education plays a key role in exposure and understanding of information including the types related to health. And this is demonstrated in the findings—the level of education has a relationship with ED consumption. Those with tertiary education are less likely to consume EDs when compared to those who have never had a formal education [82]. This could mean that the exposure to and ability to seek and understand health information such as what EDs are and what their potential side effects may be, people with formal education are better informed to make the right choices. Those who have not had a formal education are usually unable to verify information, struggle to accept new information, are easily misinformed, accepting of myths, and discard facts in some cases. A related factor of interest is the level of knowledge people have of EDs in general. An understanding of the drinks referred to as EDs, their potential benefits, side effects, and even constituent ingredients could influence the decision to consume ED products. Meanwhile, a great proportion of individuals have low knowledge of EDs [82]. Special attention should be given to those with low education status and low health literacy because formal and health education can play a critical role in the way in which people consume EDs. Evidence from other studies shows that higher education is associated with reduced consumption of EDs [58, 82]. Consumption of EDs was found to be 84% higher when consumed in private compared to consumption at public gatherings. This may be the case because EDs are served with other drink options. They may be served per person according to budgeting constraints which will impact consumption. Also, on the other hand, it is the private intrinsic needs of individuals that may push them to consume more EDs.

Recommendations for ED sale and consumption

In 2023, Ghana passed a tax bill on sugar sweetened-beverages into law. The law categorizes EDs as sugar sweetened drinks. The policy action is expected to increase individual savings and promote health [83]. Taxation is an effective strategy for reducing the consumption of sugar sweetened-beverages. While higher taxes have been more effective (above 10%), such initiatives have no significant impact in high-income countries compared to LMICs [84]. Therefore its application in Ghana is likely to yield positive results. The extant tax regulations exhibit commendable strides in mitigating the consumption of EDs; however, there exists untapped potential for further reduction. It is imperative to reconsider the categorization of EDs given that they differ from conventional sugar-sweetened beverages, as they have cardiovascular effects substantiated by several of compelling case studies [11, 8589]. This reclassification stands to facilitate a spectrum of viable interventions, encompassing but not confined to the following: stringent restrictions on the pervasive retail distribution of EDs; the implementation of rigorous age-related restrictions, and prohibition in schools governing the purchase and consumption of EDs; enhanced oversight of marketing, advertising, and product labelling; and the unequivocal disclosure of potential short- and long-term adverse effects associated with the consumption of EDs [6].

In alignment with the national food-based dietary guidelines, which stipulate that individual sugar consumption should not surpass 50 grams per day, there is a pressing need for heightened advocacy efforts aimed at fostering decreased sugar intake and curbing the consumption of sugar-sweetened beverages [90]. As EDs are prohibited in school environments, natural fruit drinks should be encouraged. This can be incorporated into the national school feeding program initiative. Additionally, it is essential to provide backing and incentives to beverage manufacturers to invest in the production of healthy, nutrient-rich beverages characterized by low sugar content and essential nutrients.

Limitations of the study

The adoption of a cross-sectional design restricts the establishment of causal relationships and temporal changes in ED consumption patterns and perceptions. The use of a convenience sample raises concerns about representativeness, potentially limiting the generalizability of findings. Self-report data may introduce recall bias and may not fully reflect actual behaviors and beliefs accurately. The choice of the study area based on personal familiarity introduces potential bias in the selection process. Face-to-face interviews might also introduce interviewer bias and compromise participant anonymity.

Conclusions

The study examined the prevalence and consumption of EDs among the youth in the Tamale Metropolis, along with their perceptions and factors influencing consumption. The findings indicate that more than half of the respondents currently consume EDs. However, there is a lack of knowledge regarding the ingredients, potential benefits, and harmful effects of EDs. Several factors were identified as independently associated with ED consumption, including age, marital status, work intensity, education level, knowledge of EDs, and the availability of EDs at public gatherings. This research highlights a high consumption and low abuse of EDs. This is despite a limited understanding of them, raising concerns about regulations related to advertising, marketing, distribution, and usage, as well as the need to quantify the size of the ED market. Unlike previous studies that focused on specific groups such as commercial drivers, students, and athletes, this study provides insights into ED use and knowledge a wider demographic.

Data Availability

All the data is available on figshare (10.6084/m9.figshare.24716805).

Funding Statement

The authors received no specific funding for this work.

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Decision Letter 0

Zakari Ali

19 Oct 2023

PONE-D-23-21713Title - The youth of tamale metropolis: understanding energy drink consumption, perceptions and related factorsPLOS ONE

Dear Dr. Kobik,

Thank you for submitting your manuscript to PLOS ONE. After careful consideration, we feel that it has merit but does not fully meet PLOS ONE’s publication criteria as it currently stands. Therefore, we invite you to submit a revised version of the manuscript that addresses the points raised during the review process.

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We will update your Data Availability statement to reflect the information you provide in your cover letter.

Additional Editor Comments:

Dear authors, we apologise for the delays in getting you feedback on your paper. We have now secured sufficient peer-review comments on your paper and are happy for you to revise based on their recommendations and submit for further evaluation. This paper is timely given the recent discussions from health and nutrition professionals in Ghana around soft and energy drinks consumption particularly among the youth.

However, it is clear from the two reviewers and from my own assessment as Editor that, your paper needs substantial proofreading to tighten up the arguments and correct language errors. Also make sure you back all claims with sufficient evidence.

1) In addition to comments from the reviewers, consider reducing sections of the discussion and introduce a new section in the discussion on policy measures/recommendations for EDs in Ghana. After reading your findings, a good question is, what next? And so what so we do, in terms of policy or action? Can you link this discussion to the recently released Ghana Food Based Dietary Guidelines? What should be done around schools? What (healthy) alternatives are there and why do you think those will be chosen over energy drinks?

2) What are the limitations of your study? Include this in the discussion. Reviewer 2 highlights some of these in different comments.

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

Reviewer #2: Yes

**********

3. Have the authors made all data underlying the findings in their manuscript fully available?

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Reviewer #1: Yes

Reviewer #2: Yes

**********

4. Is the manuscript presented in an intelligible fashion and written in standard English?

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Reviewer #1: Yes

Reviewer #2: Yes

**********

5. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: This is indeed a very good and interesting Public health topic worthy of discussion. There are some suggestions which when added, can boost the strength of this research. They are as follows ;

Introduction

1.What previous works have been done in Ghana regarding investigation of energy drink consumption

2.What gaps were identified ?

3.How unique is this work or how different is this work from the previous works

4.A map of Ghana showing Tamale and coordinates must be provided

5.Last paragraph of the intro must be reconstructed for clarity

“This study will make…..

6.Discussion seems summary of the whole report. Authors need to discuss key findings with sufficient literature

7.Make the work aligned to the health belief model

Results

8.The paragraph before socio-demographic must be sent to the Methodology portion.

Reviewer #2: That you for the opportunity to review your work. The article provides valuable insights into the consumption patterns and perceptions of energy drinks among the youth in the Tamale Metropolis. I find the work valuable and pertinent to the research landscape around energy drinks however, will benefit from some minor revisions. Find below my general and specific comments to improve the quality of your work.

General comments

Ensure consistency in terms used throughout the paper. For example, "energy drinks" and "EDs" are used interchangeably. While abbreviations are acceptable, introduce them properly the first time and use them consistently thereafter.

Ensure that all claims, especially those that are not common knowledge, are backed by appropriate references.

Maintain consistency in terms, abbreviations, and formatting throughout the paper.

Some sentences are lengthy and could be split for better readability and understanding.

The methods section, in particular, could benefit from more detailed explanations to demonstrate the rigor of the research process.

Ensure that all claims, especially statistical ones, are properly cited. For instance, statements like "62% of student-athletes consume at least one can of energy drink per week" should have a reference.

Specific Comments:

Abstract:

The sentence "Energy drinks were consumed by the majority of the youth" is redundant given the statistics provided earlier in the abstract. Consider removing or rephrasing.

Introduction:

The statement "Ingredients commonly found in energy drinks include caffeine, guarana, ginseng, taurine, glucose, L-carnitine, glucuronolactone, and B vitamins" could benefit from a citation.

The transition between the global context of energy drinks and the specific situation in Ghana could be smoother. Consider adding a sentence to bridge the two sections.

"Throughout history, humans have sought physical and cognitive enhancements to tackle challenging tasks."

This is a broad statement. Consider adding a citation or example for context.

"The rise of energy drinks (EDs) and their marketing strategies, aimed at boosting physical and cognitive performance, has led to a significant increase in consumption among young people.

"However, marketing campaigns geared towards masculinity have resulted in fewer girls consuming energy drinks than boys [3,4]." This is an interesting point. Consider expanding on how these marketing campaigns are geared towards masculinity for clarity.

Methods:

"The study design was a descriptive cross-sectional." Add more details. Why was this design chosen? What advantages does it offer for this research?

"The Tamale Metropolis is an urban area in the Northern Region with a population of about 360,579, 80.8% of which lives in urban areas and a size of 289.58 square miles [15]." This sentence is a bit cluttered. Consider splitting it: "The Tamale Metropolis, located in the Northern Region, has a population of about 360,579. Of this, 80.8% reside in urban areas. The metropolis spans 289.58 square miles [15]."

"The focus of this research was on individuals aged 15 to 45 years old." Why was this age range chosen? Provide a rationale.

Data Collection and Quality Management:

"The study collected data on individual respondents in the Tamale metropolis through semi-structured interviews using a pretested-structured questionnaire administered via face-to-face interviews with the aid of a Computer Assisted Personal Interview (CAPI) device." This is a long sentence. Consider breaking it down for clarity.

"The questionnaire covered demographic information, anthropometry, and perception, with the latter section probing respondents' knowledge of energy drinks." What specific demographic information was collected? Were there any specific scales or metrics used for the perception section.

"Consent was obtained orally. This mode was used to maximize time." Oral consent can be controversial in some research contexts. Elaborate on why this was deemed sufficient and how it was documented.

Results:

"The results of the study indicated that a large percentage of the respondents, 98.7%, had consumed energy drinks before, while 78.7% currently consume them." Consider adding a comparison to other studies or expected outcomes.

"Respondents believed that energy drinks provided additional energy (81.00%) and reduced stress (62.30%). However, they also perceived side effects such as insomnia (60.60%) and restlessness (51.40%)." Consider adding a brief discussion on why these perceptions might exist in your discussion.

"Although the majority of respondents (83.4%) were unaware of the classification of energy drinks and their ingredients, side effects, and benefits." This sentence seems incomplete. Consider completing the thought, e.g., "...the majority were still consuming them regularly."

"Age, marital status, level of education, work intensity, EDs served at gatherings, and knowledge of EDs was significantly associated with ED consumption (p < .05)." Elaborate on each factor's specific impact or correlation strength in your discussion.

Discussion:

"Energy drinks have not only been associated with negative health effects and death but have also been linked to high-risk substance use and social deviance such as vandalism and reckless driving, resulting in accidents [8–11]." This is a strong claim. Ensure that the cited references robustly support this statement.

"Sub-Saharan Africa is experiencing an upward trend in diet-related diseases, including hypertension, obesity, stroke, and heart disease, contributing to the rapid increase in the epidemic of non-communicable diseases." How does this relate to the study's findings? Consider drawing a clearer connection between the broader context and the specific results of this study.

"In Ghana, where energy drink consumption is on the rise, a survey revealed that 62% of student-athletes consume at least one can of energy drink per week." What are the implications of this finding, especially in the context of the study's results.

"The overall aim of this study was to evaluate the youth's perceptions, consumption habits, and factors linked with energy drink consumption in the Tamale Metropolis."

Reiterate the main findings at the beginning of the discussion in relation to this aim to provide a clear summary of the study's contributions.

"This study will make clear enable the understanding of the consumption habits of energy drinks among youth in the Tamale Metropolis will contribute to raising awareness, prompt more research in the area and influence policies and public health actions."

This sentence is convoluted. Rephrase for clarity: "This study enhances our understanding of energy drink consumption habits among the youth in the Tamale Metropolis. The findings can raise awareness, prompt further research, and influence policy and public health initiatives."

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6. PLOS authors have the option to publish the peer review history of their article (what does this mean?). If published, this will include your full peer review and any attached files.

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Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy.

Reviewer #1: Yes: Dr. Nii Korley Kortei

Reviewer #2: Yes: Udoka Okpalauwaekwe

**********

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PLoS One. 2024 Apr 26;19(4):e0289391. doi: 10.1371/journal.pone.0289391.r002

Author response to Decision Letter 0


3 Dec 2023

We take this opportunity to thank the editor and reviewers of our paper for their kind collaboration to the improvement of this manuscript. We have taken into account all the concerns raised and we have made the suggested modifications. We have implemented numerous improvements to the paper based on these suggestions. Below, we justify our replies to the suggestions made by the respected editor and reviewers of the paper.

EDITOR

Dear authors, we apologise for the delays in getting you feedback on your paper. We have now secured sufficient peer-review comments on your paper and are happy for you to revise based on their recommendations and submit for further evaluation. This paper is timely given the recent discussions from health and nutrition professionals in Ghana around soft and energy drinks consumption particularly among the youth. However, it is clear from the two reviewers and from my own assessment as Editor that, your paper needs substantial proofreading to tighten up the arguments and correct language errors. Also make sure you back all claims with sufficient evidence.

Thank you for providing us with the feedback from both the reviewers and your own assessment. We appreciate the time and effort invested in reviewing our manuscript. We understand the importance of ensuring the quality and clarity of our work and are committed to addressing the highlighted concerns. Here is our response to the comments.

a. The paper has undergone substantial proofreading to tighten up arguments and correct language errors.

b. All claims are now backed by sufficient evidence, ensuring a more robust presentation.

1. In addition to comments from the reviewers, consider reducing sections of the discussion and introduce a new section in the discussion on policy measures/recommendations for EDs in Ghana. After reading your findings, a good question is, what next? And so what so we do, in terms of policy or action? Can you link this discussion to the recently released Ghana Food Based Dietary Guidelines? What should be done around schools? What (healthy) alternatives are there and why do you think those will be chosen over energy drinks?

We have reduced sections of the discussion and introduced a new segment focusing on policy measures and recommendations for energy drinks (EDs) in Ghana. This addition addresses the "what next" aspect and aligns the discussion with the recently released Ghana Food Based Dietary Guidelines. We have explored potential policy implications and actions, particularly in the context of schools, and discussed healthy alternatives to energy drinks. The suggestion titled Recommendations for ED Sale and Consumption is added in the discussion section (see pgs. 20&21, line nos. 532-553).

"In 2023, Ghana passed a tax bill on sugar sweetened-beverages into law. The law categorizes EDs as sugar sweetened drinks. The policy action is expected to in-crease individual savings and promote health [83]. Taxation is an effective strategy for reducing the consumption of sugar sweetened-beverages. While higher taxes have been more effective (above 10%), such initiatives have no significant impact in high-income countries compared to LMICs [84]. The extant tax regulations exhibit commendable strides in mitigating the consumption of EDs; however, there exists untapped potential for further reduction. It is imperative to reconsider the categorization of EDs given they differ from conventional sugar-sweetened beverages, as they have cardiovascular effects substantiated by several of compelling case studies [11,85–89]. This reclassification stands to facilitate a spectrum of viable interventions, encompassing but not confined to the following: stringent restrictions on the pervasive retail distribution of EDs; the implementation of rigorous age-related restrictions, and prohibition in schools governing the purchase and consumption of EDs; enhanced oversight of marketing, advertising, and product labelling; and the unequivocal disclosure of potential short- and long-term adverse effects associated with the consumption of EDs [6].

In alignment with the national food-based dietary guidelines, which stipulate that individual sugar consumption should not surpass 50 grams per day, there is a pressing need for heightened advocacy efforts aimed at fostering decreased sugar intake and curbing the consumption of sugar-sweetened beverages [90]. As EDs are prohibited in school environments, natural fruit drinks should be encouraged. This can be incorporated into the national school feeding program initiative. Additionally, it is essential to provide backing and incentives to beverage manufacturers to invest in the production of healthy, nutrient-rich beverages characterized by low sugar content."

2. What are the limitations of your study? Include this in the discussion. Reviewer 2 highlights some of these in different comments.

Limitations of the study have been included in the discussion (see pg. 21, line nos. 555-561 ). We have elaborated on the potential shortcomings and challenges faced during the research process, providing a more comprehensive understanding of the study's scope and applicability.

"The adoption of a cross-sectional design restricts the establishment of causal relationships and temporal changes in ED consumption patterns and perceptions. The use of a convenience sample raises concerns about representativeness, potentially limiting the generalizability of findings. Self-report data may introduce recall bias and may not fully reflect actual behaviours and beliefs accurately. The choice of the study area based on personal familiarity introduces potential bias in the selection process. Face-to-face interviews might also introduce interviewer bias and compromise participant anonymity."

REVIEWER 1

This is indeed a very good and interesting Public health topic worthy of discussion. There are some suggestions which when added, can boost the strength of this research.

Thank you for your thoughtful and constructive feedback on our research manuscript. We appreciate your positive remarks on the significance of the public health topic. We have carefully considered your suggestions and made the following revisions.

1. What previous works have been done in Ghana regarding investigation of energy drink consumption?

We have included a section summarizing previous works on energy drink consumption in Ghana in the introduction section (see pg. 3, line nos. 84-86)., identifying gaps, and highlighting the uniqueness of our study.

"This study builds upon existing research on ED consumption in Ghana, expanding beyond previous investigations that predominantly focused on specific cohorts like students, student-athletes, and drivers [19–24]."

2. What gaps were identified?

We have included some information in the introduction section on the identified gap (see pg. 3, line nos. 86&88). and highlighting the uniqueness of our study.

"However, they have left a gap in our understanding of ED consumption among the general youth population."

3. How unique is this work or how different is this work from the previous works?

We have included some information in the introduction section on the identified gap (see pg. 3, line nos. 87&88). and highlighting the uniqueness of our study.

"This study addresses this gap by examining ED consumption among a representative sample of Ghanaian youth."

4. A map of Ghana showing Tamale and coordinates must be provided.

A map of Tamale with a label showing the coordinates has been incorporated for better geographic context. We opted to use only the map of Tamale instead of the whole map of Ghana with the map of Tamale highlighted because in that view the Tamale area is not visible enough.

"Fig 1. Map of Tamale (Coordinates: 9.404601, -0.842389)."

5. Last paragraph of the intro must be reconstructed for clarity

“This study will make…..

The last paragraph of the introduction has been revised for clarity, ensuring a more succinct expression of our study's aims and contributions (see introduction, pg. 4, line nos. 91-93).

"This study enhances our understanding of ED consumption habits among the youth in the Tamale Metropolis. The findings can raise awareness, prompt further research in this domain, and influence policy and public health initiatives."

6. Discussion seems summary of the whole report. Authors need to discuss key findings with sufficient literature

We have expanded the discussion section to provide more in-depth analysis and interpretation of key findings, incorporating relevant literature to support our arguments.

(See discussion section, pg. 15, lines 322-329)

"This study found that the popularity of EDs is highly driven by advertising media, especially television. In support of this assertion, Stacey et al. [31] substantiated a correlation between the consumption of EDs and the exposure to promotional advertisements of ED brands. These advertisements were found to typically target a youthful male audience using sports and entertainment-centred themes [32], and leveraging associations with influential celebrities. Gendered advertising reflects the leveraging of higher involvement of males in sports. This is in line with an American study that strongly links ED consumption to traditional masculinity and risk-taking tendencies [33]."

(See discussion section, pg. 16, line nos. 341-343)

"In contrast to this study, prior research conducted in Ghana has yielded dissimilar results, with the most frequently consumed ED brands being identified as Blue Jeans, Lucozade, Rox, Monster, and Red Bull [20,21]."

(See discussion/knowledge section, pg. 16, line nos. 349-361)

"EDs are perceived to have several benefits, including increased alertness, improved work or study concentration, energy boost, stress management, and pro-motion of health and social relationships [15]. This study aligns with previous re-search [22,27,36,37], indicating a prevailing belief in the benefits of EDs, with the highest perceived advantages being increased work or study concentration (20%), energy boost (81%), and stress management (62.3%). Also, this study reported perceived adverse effects including insomnia (60.60%), and restlessness (51.40%) as commonly reported adverse effects of EDs, similar to work by Casuccio et al. [26]. While perception is known to be autonomous concerning thought, knowledge may lead to an intentional intervention in the process of achieving a percept [38]. This suggests perceptions may be influenced by external factors, notably well-targeted advertisements and recommendations from friends and family, which con-tribute to shaping a positive view of EDs among consumers. Understanding these external influences is crucial for devising effective health communication strategies and interventions to promote informed and balanced perspectives on ED consumption."

(See discussion/knowledge section, pg. 16, line nos. 362-370)

"Further, upon analysing the data, it is evident that a large proportion of the sample population in this study has poor knowledge of EDs, accounting for 83.4%. This trend is consistent with another study that also reported a high rate of poor knowledge among participants [19]. However, in contrast to this study Saku et al., [19] did not find a significant relationship between knowledge and ED use. The findings of this study suggest that low knowledge can result in a high prevalence of ED use. Therefore, it is crucial to address issues of misconceptions and lack of knowledge. For instance, information about the adverse effects of EDs can be incorporated into default marketing strategies. Also, the lack of warning labels and inadequate inclusion of risks and side effects in advertisements and messaging con-tribute to this poor knowledge [19,32,39]."

(See discussion/attitude and practice section, pg. 16&17, line nos. 377-389)

"Moreover, an even higher percentage of individuals have ever tried EDs, with nearly the entire study population (98.7%) reporting consumption at some point. This trend is consistent with studies conducted among adolescents in Shanghai, China (70.5%) and in Ho (85.6%) [19,41]. The high prevalence of ever-consuming EDs is attributed to factors such as curiosity and perceived utility [24,36]. The increasing popularity of EDs is also attributed to various factors, including individual factors such as perceived benefits, targeted marketing strategies, and limited knowledge about these beverages [21,32,42]. Additionally, interpersonal factors like peer pressure, social image, and parental influence also play a role, along with environmental factors such as affordability, availability, and the lack of policies and regulations [41]. In the context of the HBM [30], these external factors serve as triggers of ED consumption. They can significantly impact individuals’ decision to consume EDs. Therefore, such channels of influence must be monitored to ensure that the general public is well-informed to make healthy choices."

(See discussion/attitude and practice section, pg. 17, lines nos. 394-402)

"The main reasons for consuming EDs reported by the respondents were performance enhancement, stress management, energy boost, and increased work or study concentration. In similar studies conducted among drivers, students and athletes, it was reported that EDs were used to manage fatigue, stay awake, and concentrate for extended periods [19,49–51]. Many ED users appreciate their ability to reduce sleep hours, enhance concentration, boost energy, and serve as refreshments. Particularly, workers use EDs to enhance performance in the workplace, while students use them to cope with academic pressure [19,50,51]. Withdrawal symptoms were reported by ED consumers once the effects wore off. This potentially leads to dependence and workplace accidents that is a risk to themselves and others [52,53]."

(See discussion/attitude and practice section, pg. 17&18, lines nos. 416-422)

"EDs are particularly popular among young individuals, especially those in their early twenties [32,36,54]. This can be attributed to the energy-demanding nature of that age group [55]. Young people's curiosity [56] and inclination to follow trends also contribute to their higher consumption of EDs compared to older individuals [43]. Additionally, males generally consume EDs more frequently, particularly at night, and experience more side effects. This aligns with the marketing strategies of EDs, which often target young males and emphasize activities associated with youth and masculinity, such as sports. [6,31,36,54,57,58]."

(See discussion/attitude and practice section, pg. 18, line nos. 424&425)

"Education level is associated with ED use [26,59]. Accordingly, ED consumption is higher among those with low education levels, and people who work or study long hours [19]."

(See discussion/attitude and practice, pg. 18, line nos. 438-449)

"According to this study, smokers make up a small proportion of ED consumers. The lack of association between alcohol consumption and ED use is attributed to taste preferences and concerns about the impact of combining the two for performance [62] - one of the primary reasons for consuming EDs among the participants in this study. Similar to previous studies by Casuccio et al. [26]. and Chang et al. [15], no significant associations were found between ED use and these variables. Furthermore, this study revealed that easy access to EDs corresponds to higher consumption rates. EDs are readily available and easily accessible [63] to children and young adults, with numerous brands found in every shop that sells beverages [47,64]. Additionally, there is a lack of government regulations governing the sale and marketing of EDs. This unrestricted promotion and utilization of EDs contribute to their increasing appeal, popularity, and availability [5]. The knowledge or experience of side effects also plays a role in influencing the use of EDs [64]."

(See discussion/predictors of ED consumption, pg. 19, line nos. 497-499)

However, generally, ED consumption decreases with increasing age [40,79,80]. Marital status is a predictor of ED consumption as well [81].

7. Make the work aligned to the health belief model

The disc

Attachment

Submitted filename: Response to Reviewers.docx

pone.0289391.s001.docx (149.1KB, docx)

Decision Letter 1

Zakari Ali

16 Jan 2024

Title - Energy drinks in Tamale: Understanding youth perceptions, consumption patterns and related factors

PONE-D-23-21713R1

Dear Dr. Kobik,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication.

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Kind regards,

Zakari Ali, PhD.

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. If the authors have adequately addressed your comments raised in a previous round of review and you feel that this manuscript is now acceptable for publication, you may indicate that here to bypass the “Comments to the Author” section, enter your conflict of interest statement in the “Confidential to Editor” section, and submit your "Accept" recommendation.

Reviewer #1: All comments have been addressed

Reviewer #2: All comments have been addressed

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2. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

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3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

Reviewer #2: Yes

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4. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

Reviewer #2: Yes

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5. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

Reviewer #2: Yes

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6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: The Authors have answered all queries satisfactorily. The work has improved tremendously.

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Reviewer #2: I appreciate the conscientious attention to all the reviewer comments and in providing further context to enhance the readability of your work. Weldone and look forward to reading from you in the further.

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7. PLOS authors have the option to publish the peer review history of their article (what does this mean?). If published, this will include your full peer review and any attached files.

If you choose “no”, your identity will remain anonymous but your review may still be made public.

Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy.

Reviewer #1: Yes: Nii Korley Kortei

Reviewer #2: Yes: Udoka Okpalauwaekwe

**********

Associated Data

    This section collects any data citations, data availability statements, or supplementary materials included in this article.

    Supplementary Materials

    Attachment

    Submitted filename: Response to Reviewers.docx

    pone.0289391.s001.docx (149.1KB, docx)

    Data Availability Statement

    All the data is available on figshare (10.6084/m9.figshare.24716805).


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