What this study adds is plausibility, not a final answer. A small, 16-week intervention with both a Mediterranean-style pattern and omega-3 supplementation is consistent with the idea that acne can be influenced by inflammation, dietary fat quality and overall eating patterns. But because the design did not include a placebo control, it cannot tell us how much of the improvement came from the supplement, the diet shift, natural fluctuation, or participants simply changing multiple habits at once.
The omega-3 signal is biologically reasonable. EPA and DHA are involved in inflammatory pathways, so raising low baseline levels could affect skin lesions in some people. Still, biochemical improvement does not automatically mean the same effect will appear in broader acne populations. The participants were selected for mild to moderate acne and nearly all started with omega-3 deficits, so the findings may be most relevant to people with similarly low intake rather than to everyone with acne.
There is also a practical trade-off in how people interpret โdiet triggers.โ The study reduced animal products and dairy intake, but that does not prove those foods are universal acne drivers. Acne is heterogeneous, and self-observed triggers can be real for an individual even when the overall evidence is mixed. In practice, the most defensible takeaway is not a rigid acne diet, but a cautious, personalized approach that considers nutrition quality, symptom tracking and whether a pattern is sustainable.
For readers, the bigger message is about using food as an adjunct, not a replacement. Dietary change may support skin health, but established acne care still matters when symptoms are persistent, severe or scarring. This kind of evidence is useful because it points toward low-risk lifestyle support while also showing where stronger randomized trials are still needed.
In the newly published study, 60 participants experiencing mild to moderate acne were asked to follow the Mediterranean Diet and take omega-3 supplements over 16 weeks. The research, conducted at the University of Munich, Germany and the University of Miami, US, reveals that improving nutrition through these two alterations results in a reduction of skin lesions.
โLifestyle interventions, including dietary recommendations, should not be considered in opposition to prescription medications, but rather as a valuable adjunct to any modern acne treatment plan,โ comments co-author Anne Guertler of the Ludwig Maximilian University of Munich.
At the start of the study, 98.3% of participants had omega-3 fatty acid deficits. The severity of their acne decreased throughout the study when the necessary intake of omega-3 was met.
โFuture studies should build on the foundation laid by our current findings in a randomized, placebo-controlled design to improve dietary recommendations for acne patients,โ adds Guertler.
Nutrient deficiencies and acne
Theย
study, published in theย
Journal of Cosmetic Dermatology, aimed to improve the EPA/DHA levels in acne patients through dietary intervention and supplementation to allow for the observation of the subsequent clinical effects.
The research team observed objective improvements in both inflammatory and non-inflammatory skin lesions.The research team points out that omega-3 fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are essential nutrients with
ย anti-inflammatory properties. They can reduce proinflammatory cytokines, eicosanoids and insulin-like growth factor-1.
The 60 participants with mild to moderate acne were not receiving prescription medication before and during the study.
They were asked to adhere to the Mediterranean Diet, which, on average, reduced their consumption of animal products and increased that of fruit and vegetables. The Mediterranean Diet is consistently
ย ranked by expertsย as the healthiest diet to follow.
The acne-affected participants further incorporated oral algae-derived omega-3 supplementation. They were given 600 mg DHA and 300 mg EPA during the first eight weeks and 800 mg DHA and 400 mg EPA during the last eight weeks.
The study included four visits during which blood EPA and DHA levels were noted using the HS-omega-3 index, which reveals EPA and DHA as a percentage of the total identified fatty acids in erythrocytes (red blood cells). The target is 8 to 11%, the deficit is under 8% and the severe deficit is under 4%. During visits, the participants also filled out standardized questionnaires.
Not only did 98.3% of the participants have an EPA and DHA deficit at the start of the study, but the mean HS-omega-3 index was just 4.9%. At the fourth visit, the mean had risen to 8.3%, which is within the target.
The research team observed โobjective improvements in both inflammatory and non-inflammatory skin lesions.โ
In four of the participants, the self-reported appearance worsened. Overall, the self-reported quality of life improved.
The study facilitated the definition of dietary triggers (animal products) but less the definition of beneficial foods. Throughout the study, the intake of cowโs milk and dairy products was reduced, compliance was good and no adverse events were reported.
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