Potential Dangers of Adult Cosmetics to Preteen and Teenage Girls

Abstract

Cosmetic use among preteens and adolescents is increasingly common, fueled by social media trends and marketing campaigns that blur the lines between childhood innocence and adult beauty culture. Although these products are often marketed as safe, many contain chemicals of concern, including endocrine-disruptions agents, allergens, and potential carcinogens. Early and prolonged exposure during critical stages of growth raises important questions about immediate and long-term health consequences.

Children and teenagers are particularly vulnerable because their skin barrier is thinner and more permeable than that of adults, allowing greater absorption of harmful substances. Endocrine-disrupting chemicals interfere with normal hormonal pathways, potentially altering physical development and reproductive health. Fragrances and preservatives may provoke allergic or irritant reactions, leading to dermatologic conditions such as contact dermatitis and acne exacerbation. Cumulative exposure over years may also increase the risk of cellular damage or malignancy.

Beyond physical effects, cosmetic use during adolescence carries psychosocial implications. Engagement with appearance-focused products reinforces unattainable beauty ideals, heightens self-consciousness, and may increase anxiety, body dissatisfaction, and eating-disorder behaviors. These risks are amplified by advertising practices that emphasize perfection while concealing potential harms. Strengthening regulation, ingredient transparency, age-specific safety testing, and public health education is needed to safeguard adolescent well-being.

Introduction

The 1978 film “Pretty Baby,” set in 1917 and based on a true story, depicted the tale of a 12-year-old girl raised in a New Orleans brothel who was made up to look like a much older woman. Public attention to historical patterns of portraying children as older than they are. This example reflects a long-standing societal tendency to blur the distinction between childhood and adult appearances.

In today’s digital age, where a 7-year-old can share her daily skincare routine with millions on TikTok, the line between childhood innocence and adult beauty culture is blurring faster than ever.¹ Recent pediatric consumer data show that even children younger than10 often use multiple cosmetic products daily, with some using 5 or more items regularly. Impressionable preteens and teens scrolling through social media are frequently influenced by glamorous influencers promoting top-selling, ornamentally packaged cosmetics aimed at adults. They are unaware that behind all that shimmer is a mixture of chemicals that could harm their developing skin, hormones, and self-esteem. The widespread use and acceptance of cosmetics among adolescent females raise questions about the safety and potential effects these products, designed for adults, might have on preteens and teens.²

Evidence of Human Exposure to Potential Toxicants

Cosmetic products marketed to and used by preteens and teenage girls often contain potentially harmful ingredients that raise safety concerns for their developing bodies. It is important to distinguish between hazard, which is the presence of a potentially harmful chemical, and risk, which depends on dose, duration, and actual exposure. Many cosmetic exposures occur at low levels, but the potential cumulative effects over years of use in children are still not well studied. Some of the most concerning ingredients in certain cosmetics are potential endocrine-disrupting chemicals (EDCs), such as phthalates, parabens, and phenols.^3,4 Another group of xenobiotics of concern is potential allergens in fragrances (e.g., linalool, limonene, benzyl alcohol, oakmoss extract) that can cause skin irritation and both local and systemic allergic reactions.⁵ Finally, potential carcinogens such as ethoxylated chemicals, formaldehyde-releasing agents, ethanolamine, and inorganic materials, including carbon and silica, have been found in common products, raising concerns about possible long-term health effects, especially with chronic exposure.⁶

In recent years, “paraben-free” formulations have become a major marketing trend. Although these products remove parabens, they frequently substitute alternative preservatives with long-term endocrine or irritant potential is not well studied. Evidence remains limited on whether such substitutions meaningfully reduce risk, especially for children and adolescents.

A landmark trial demonstrating the impact of cosmetic products on chemical exposure in adolescent girls is exemplified by the Health and Environmental Research on Makeup of Salinas Adolescents Intervention Study.⁷ This trial examined whether using common cosmetics could lead to an excessive body burden of xenobiotics capable of causing endocrine disruption, such as EDCs. The study enrolled 100 Latina adolescent girls and measured urinary levels of various EDC biomarkers, including mono-ethyl phthalate, methyl and propyl parabens, triclosan (a disinfectant), and benzophenone-3 (a common sunscreen ingredient). The intervention involved replacing the participants’ regular personal care products with those labeled “free” of these hazardous chemicals. Just 3 days of using these “free-from” products resulted in significant reductions in urine levels of these EDCs (Table). This study highlights short-term, measurable decreases in biomarker levels of xenobiotics found in many widely used cosmetic products. However, the limited 3-day intervention period, the lack of long-term outcome data, increases in some parabens, and the inability to establish causality restrict the conclusions that can be drawn.⁷

Table.

Changes in Urinary Biomarkers following Cosmetic Substitution in Adolescent Girls

Chemical Group	Analytes	Main Change After Intervention	Trend (%)
Phthalates	MEP	Significant ↓	−27.4%
	MnBP	Small ↓	−11.3%
	MiBP	Minimal change	−0.5%
Parabens	Methyl propyl	Large ↓	−43.9%
	Ethyl propyl	Large ↑	+47.3%
	Butyl propyl	Large ↑	+101.7%
	Propyl paraben	Large ↓	−45.4%
Phenols	Triclosan	Large ↓	−35.7%
	BP-3	Large ↓	−36.0%

Phthalates, parabens, and phenols are grouped by chemical class. Arrows indicate the direction of change, with percent values representing the relative change compared with baseline. Green arrows = decrease. Red arrows = increase.

BP-3, benzophenone-3; MEP, mono-ethyl phthalate; ; MiBP, monoisobutyl phthalate; MnBP, monobutyl phthalate

Adapted from Harley et al. ⁷

Several top-selling cosmetics have been found to contain various potential carcinogens.⁶ Chemicals known to release formaldehyde, a human carcinogen that damages DNA and can lead to increased cell mutations, are present in trace amounts. Ethanolamine, often used as an emulsifier or pH adjuster, has also been associated with carcinogenic potential. Additionally, inorganic compounds in foundation and face powder, such as carbon and silica, have been linked to possible carcinogenic activity upon long-term exposure.⁶ As people start applying cosmetics and makeup at younger ages, the length of use and cumulative exposure to these harmful chemicals increase, which may heighten the risk of long-term health issues.^2–4

Pathobiology Associated With Cosmetic Use in Children and Adolescents

Developmental differences in pediatric skin result in a more permeable barrier compared with adults, as demonstrated in the cross-sectional study by Kong et al.⁸ The authors found that key features of the skin barrier, such as hydration, transepidermal water loss, and surface pH, differ markedly in early life and continue to mature throughout childhood. Although transepidermal water loss is useful for assessing barrier function, it does not directly measure how readily chemicals penetrate the dermis. Of note, the study showed that children’s skin is not uniformly thinner across all anatomical sites, but overall remains structurally and functionally less mature, contributing to increased permeability relative to adult skin. Endocrine-disrupting chemicals interact with the body’s hormonal system in 2 ways: by mimicking or inhibiting natural hormones.⁹ Some EDCs have structural similarity to endogenous hormones, such as estrogen, androgen, or thyroid hormones, and can therefore bind to hormone receptors and improperly activate them. This can trigger false signals, alter gene expression, and disrupt physiological processes, potentially leading to negative developmental and reproductive effects.⁴

Allergens and irritants can alter the cellular integrity of the epidermis and dermis.⁵ Fragrance chemicals penetrate the skin barrier, and either the xenobiotic or its metabolites can react with proteins to form haptens. The hapten-protein complexes are identified as foreign by antigen-presenting cells (Langerhans cells) in the epidermis. These cells process the complexes and migrate to regional lymph nodes, where they activate T cells, which may trigger an immune response by secreting proinflammatory cytokines. These internal compounds disrupt dermal integrity and cause inflammation, redness, itching, swelling, and sometimes vesicle formation.¹⁰ In young girls who may have underlying atopic dermatitis, it is not known whether this condition could predispose individuals to enhanced cellular injury.

Repeated systemic exposure to potential carcinogens in cosmetics can induce cellular transformation and lead to the development of neoplasms.⁶ These compounds either are genotoxic, causing direct DNA damage, or they are metabolized into reactive metabolites capable of inducing cellular injury upon absorption.¹⁰ For instance, formaldehyde can form DNA-protein crosslinks and cause mutations by damaging dermal DNA. Ethoxylates may contain trace amounts of 1,4-dioxane, an impurity associated with carcinogenicity through oxidative stress and DNA damage.¹¹ Parabens, which mimic estrogen, can bind to estrogen receptors and stimulate the proliferation of hormone-sensitive breast cells; chronic exposure may promote malignant transformation phenotypes.⁹

Regulatory and Product Labeling Considerations of Cosmetic Products

Although cosmetic use is common among teenagers, current United States laws permit minimal regulation of ingredient safety, labeling, and advertising standards. The Federal Food, Drug, and Cosmetic Act exempts all products—except those with color additives—from premarket approval by the Food and Drug Administration.¹² This leniency promotes the use of cosmetic agents that may contain potentially harmful xenobiotics, as the lack of comprehensive information leaves consumers largely uninformed. Additionally, most companies perform safety testing only in adult animal models and adult volunteers, and pediatric testing is not mandated. As a result, product safety profiles often do not accurately reflect the physiology or vulnerabilities of developing skin. Many individuals who buy cosmetics for teenagers rely on peer recommendations and social media instead of safety data. The absence of mandatory safety testing for cosmetics and their ingredients thus raises the risk of significant human toxicity.

Provisions in the Food and Drug Administration Federal Food, Drug, and Cosmetic Act and the Fair Packaging and Labeling Act require that cosmetic labels list each ingredient in order of decreasing prominence, with certain allowed exceptions (21 CFR 701.3). Loopholes in the cosmetic industry’s labeling practices permit many products to bypass the open hazardous warning mandated by the Classification, Labeling, and Packaging regulations.¹³ For example, products labeled as “fragrance” or “parfum” do not have to disclose the hundreds of individual chemicals they contain, which could potentially be harmful. Furthermore, instead of providing transparent safety information about potentially dangerous ingredients, most cosmetic companies use eye-catching, trendy packaging and persuasive marketing to appeal to adolescent females, which can create a false sense of safety about these products.

Recent legislative attempts to “crack down” on potential cosmetic toxicity require full ingredient disclosure, mandate safety testing for all products, and enhance protection for vulnerable groups such as children and teenagers.¹⁴ As skincare among teens and preteens continues to be fueled by social media and influencers, cosmetic use is only going to grow, which further emphasizes the importance of ensuring that products on the market are safe for young, developing skin. Adolescent cosmetic consumption is also confirmed by a study indicating the pressing need for pediatric-specific cosmetics that have been safety-tested for the special physiology and vulnerability of developing skin.¹⁵

Potential Medical Problems Associated With Cosmetic Use in Children

There are certain other medical conditions that can be associated with cosmetic use by teenagers, such as dermatologic conditions, hypersensitivity reactions, and psychosocial problems.^13–15

Because the stratum corneum is thinner during adolescence, teenagers generally have increased dermal permeability, which can predispose them to dermatologic conditions such as contact dermatitis, allergic dermatitis, and acne.^16–19 Contact dermatitis is one of the most frequently reported cosmetic-induced skin conditions in teenagers.¹⁷ Research shows that eyelid skin is particularly susceptible due to its thin nature, leading to redness, swelling, and itching.¹⁶ Fragrance allergy is also problematic with cosmetic use in preteens and adolescents, as these chemicals penetrate the skin and can cause immune-mediated inflammation.⁵ Time-dependent sensitization can result in persistent skin issues from even limited exposure to an allergen. Acne vulgaris has also been associated with the use of cosmetics.¹⁸ In 140 urban adolescent Sri Lankan girls, the severity of their acne was positively correlated with their cosmetic use.¹⁹ It is important to note that this study relied on self-reported cosmetic use and did not fully control for confounding variables such as diet, stress, or hormonal status. Of note, occlusive cosmetics, such as foundation or thick creams, can worsen acne by blocking skin pores and impairing normal skin functions like sweating or sebaceous oil release. This can intensify acne symptoms and prolong healing, increasing the risk of post-inflammatory hyperpigmentation and scarring. Historically, comedogenicity ratings were based on rabbit ear bioassays, which overestimate real-world likelihood of poor blockage in humans. Modern dermatology no longer relies on ingredient-level comedogenicity lists; current evidence supports evaluating whole formulations rather than single ingredients.²⁰

Early exposure to adult-formulated cosmetic products introduces preteen and adolescent girls to beauty ideals and appearance standards that can significantly impact their self-esteem.^21–24 Advertising campaigns and social media frequently display heavily edited and filtered images, emphasizing that physical appearance influences how people feel about themselves.²² When adolescents are repeatedly exposed to these messages, they adopt unattainable beauty standards, which can result in body dissatisfaction and lower self-worth.²³ Adolescence is a critical period for self-identification, and teenagers are especially vulnerable to external influences during this time.²³ Cosmetic advertisements exploit this vulnerability by promoting makeup to “correct” perceived flaws for social acceptance. This pressure can increase appearance-related anxiety, social comparison, and, in some cases, lead to eating disorders as teens struggle to meet these beauty ideals.^23,24

Methods to Address the Problem of Teen Cosmetic Use

Current efforts to reduce teenage cosmetic use mainly focus on education and voluntary behavior change.²⁵ Educational programs targeting parents, clinicians, and adolescent girls are now beginning to highlight the potential health risks of early cosmetic use and exposure to possibly harmful chemicals. Clinical treatment trials, such as the Health and Environmental Research on Makeup of Salinas Adolescents study,⁷ have shown that replacing standard products with “clean” ones can notably decrease the levels of biomarkers associated with toxic chemical exposure within just a few days. Additionally, advocacy groups and child dermatology experts are increasingly calling for more labeling requirements and age-specific product testing, although these practices are still far from becoming routine.¹⁵

Opportunities exist to expand and strengthen these efforts. Implementing stricter policies could require full ingredient disclosure, demand comprehensive product labeling, and mandate safety testing for cosmetic products before they are sold to young consumers. Promoting the use of safer, age-appropriate skincare products may reduce reliance on adult-formulated products that contain potentially harmful ingredients. Including educational content on this topic in general health education could empower teens to critically assess influencer marketing and recognize sponsored media, thereby lowering their vulnerability to harm from cosmetic use.

Future Directions

To protect the health of young cosmetic users, there is an urgent need for additional studies to assess the long-term effects of childhood and adolescent exposure to xenobiotics associated with dermal and systemic toxicity from long-term cosmetic use. Developing and implementing pediatric-specific regulations for cosmetics, along with clear and consistent product labeling, would better safeguard this vulnerable group. Public health policies could be strengthened by integrating social media monitoring systems to track and regulate cosmetic advertising targeted at adolescents. Ongoing awareness campaigns led by healthcare professionals, educators, and nongovernmental organizations would also help inform young people and their parents about safe cosmetic use and how to make informed decisions.

If the beauty industry continues to target its products at the youngest, most impressionable, and most vulnerable consumers, it must accept a responsibility far greater than just making a profit. What shines on the surface should not hide potential toxins that could reasonably endanger developing bodies and futures.

Conclusions

Current products are mainly tested and developed for adults, with little consideration of cumulative exposure after a decade of teenage use. Updating regulations, ensuring proper hazard labeling, and requiring pediatric safety studies would help prevent young consumers from unknowingly being exposed to toxic substances in beauty and personal care products. Protecting adolescent health is not optional—it is an ethical duty. True beauty is not found in packaging or marketing, but in ensuring that what we give young girls nurtures rather than harms them.

ABBREVIATIONS

EDC

endocrine-disrupting chemical