Table 3.

Selected studies on the effect of fatty foods on the pathogenesis of acne vulgaris.

Research	Year	Methodology	Key Result	References
Wei B. et al.	2010	Using a questionnaire, data were collected from 5696 adolescents in north-eastern China (2920 patients and 2776 controls).	Acne risk factors were identified, among which fried foods were listed.	[88]
Abo El-Fetoh N. M. et al.	2016	Four hundred male students from Arar (Kingdom of Saudi Arabia) were recruited for the research. Figures were collected by personal discussion and survey methods.	Consumption of fatty foods as a risk factor for acne vulgaris.	[89]
Aalemi A. K. et al.	2019	Using the Global Acne Severity Scale, dermatologists assessed the severity of acne in 279 Kabul residents with acne and 279 control subjects. Participants were aged between 10 and 24 years. Eating habits have been recorded with the help of a survey.	Intake of products such as crisps, pizza, or red meat had a positive correlation with the occurrence of acne lesions.	[9]
Penso L. et al.	2020	24,452 French residents completed an online questionnaire where they classified their acne condition. Links of dietary habits and acne were investigated in multinomial logistic regression models. The survey was conducted as element of the NutriNet-Santé study.	A significant association was found between current acne and the consumption of oily products.	[54]