In general, specific foods do not directly cause acne. Extensive research has shown that the primary cause of acne is biological factors, such as hormonal fluctuations, which lead to increased oil production and clogged pores. However, certain foods like fried items, dairy, processed sugars, and milk chocolate may worsen acne by affecting hormone levels. While the connection is not fully proven, these foods are believed to contribute to hormonal imbalances that can trigger acne in some individuals.