Can diet affect acne severity?

What foods are most clearly linked to worse acne?

The strongest and most consistent evidence points to high-glycemic foods — those that spike your blood sugar quickly, like sugary drinks, sweets, white rice, and chocolate. A 2022 systematic review of 34 studies concluded that high glycemic index and high daily glycemic load are positively associated with acne development and severity, and this is backed by randomized controlled trials [5]. In a 2021 study of 2,467 Thai adolescents, eating white rice was linked to 80% higher odds of more severe acne, and consuming oily or fried food more than three times per week raised the odds by 84% [3]. A 2015 French survey of 15- to 24-year-olds found that daily consumption of chocolate and sweets was independently associated with acne, with an odds ratio of 2.38 — meaning those who ate them daily were more than twice as likely to have acne [7]. A 2025 study of 300 early adolescents found that high-glycemic-index food intake was significantly correlated with higher acne grades [6].

Dairy is the second most-studied dietary factor, but the evidence is more mixed. A 2013 Italian case-control study found that drinking more than three portions of milk per week increased the risk of moderate-to-severe acne by 78%, and the association was stronger for skim milk than whole milk [8]. However, a 2025 cross-sectional study of 386 participants found no statistically significant association between dairy intake and acne severity after adjusting for other factors [2]. A 2022 systematic review noted that the link between dairy and acne may depend on sex, ethnicity, and cultural dietary habits, and is more consistently seen in populations where a Western diet is common [5]. So while dairy may be a trigger for some people, it is not as universal a culprit as high-glycemic foods.

Can certain foods or supplements help clear acne?

Omega-3 fatty acids (found in fish oil) have anti-inflammatory effects that could theoretically reduce acne, but the clinical evidence is still weak. A 2022 review of three clinical trials on omega-3 supplements found inconclusive results: one small pilot study of 5 patients showed a reduction in inflammatory lesions from 20.8 to 6.8 after 8 weeks, but patients also took other supplements, so the effect could not be attributed to omega-3s alone [1]. A 2012 study of 13 males found no significant difference in lesion count after 12 weeks of omega-3 supplementation, though 8 of 13 individuals did improve [1]. The largest and best-designed trial in that review, a 2014 randomized controlled trial of 46 patients, found that both omega-3 and omega-6 supplements led to significant improvements compared to a control group, with no significant difference between the two types of fatty acids [1]. This suggests that the benefit may come from replacing other dietary fats rather than from omega-3s specifically.

Other dietary factors may also play a protective role. The 2021 Thai study found that eating vegetables was associated with 26% lower odds of severe acne, and drinking sugar-free, milk-free tea was linked to 39% lower odds [3]. A 2013 Italian study found that eating fish was associated with a 32% lower risk of moderate-to-severe acne [8]. These findings suggest that a diet rich in vegetables and low in high-glycemic foods and dairy may help reduce acne severity, but more research is needed to confirm these associations.

Why don't all studies agree, and what should you do?

The research on diet and acne is complicated by several factors. First, many studies rely on people self-reporting what they eat, which can be inaccurate. Second, acne severity is influenced by genetics, hormones, stress, and skincare habits — all of which can mask or amplify dietary effects. For example, a 2013 study found that a family history of acne in first-degree relatives raised the risk of moderate-to-severe acne by 241% [8], which is a much stronger effect than any single food. Third, different populations respond differently: a food that triggers acne in one person may not affect another, as seen in the mixed results for dairy across different ethnic groups [5].

Despite these complexities, the overall pattern across the 15 studies reviewed here is clear: high-glycemic foods and, to a lesser extent, dairy are consistently associated with worse acne in larger and higher-quality studies [5][3][6][7][8]. The evidence for other foods like chocolate, red meat, and fast food is weaker or mixed [2][4]. For someone looking to manage their acne through diet, the most evidence-backed step is to reduce high-glycemic foods (sugary drinks, sweets, white bread, white rice) and consider cutting back on milk, especially skim milk. Adding vegetables and fish may also help. However, diet is just one piece of the puzzle — it is not a replacement for medical treatments like topical retinoids, antibiotics, or hormonal therapy, which have much stronger evidence for effectiveness.

About These Sources

This answer is built on 8 peer-reviewed studies — published from 2013 to 2025, 2 from 2024 or later, 3 in Q1 journals, collectively cited 99 times — selected as the most relevant from 15 studies that passed quality screening, drawn from 54 papers retrieved from a database of over 500 million.

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