Omega-3 fatty acids, found primarily in fatty fish, walnuts, and flaxseed, are among the most extensively studied dietary supplements in the world. Their anti-inflammatory properties are well-established at the molecular level. Whether those properties translate meaningfully into clinical improvement in skin conditions is the central question.
What Are Omega-3 Fatty Acids?
The three most clinically relevant forms are: – EPA (eicosapentaenoic acid), found in fatty fish and fish oil; strongly anti-inflammatory – DHA (docosahexaenoic acid), found in fatty fish; essential for neurological function; anti-inflammatory – ALA (alpha-linolenic acid), found in flaxseed, chia seeds, walnuts; plant-based; converted to EPA and DHA inefficiently in humans
The Anti-Inflammatory Mechanism
Omega-3s compete with omega-6 arachidonic acid for the same metabolic enzymes. While omega-6 metabolism produces pro-inflammatory eicosanoids, omega-3 metabolism produces resolvins and protectins, specialized pro-resolving mediators that actively resolve inflammation.
Evidence for Specific Skin Conditions
Atopic dermatitis: Multiple trials have studied EPA/DHA supplementation in eczema. Results are mixed, some show modest reductions in eczema severity, others show no significant effect. Meta-analyses generally find a small anti-inflammatory benefit.
Psoriasis: Similar pattern, plausible mechanism, modest benefit in some trials, inconsistent results overall.
Practical Guidance
- Aim for 2 servings of fatty fish per week (salmon, mackerel, sardines, herring)
- If supplementing: EPA + DHA 1,000–3,000 mg/day from a reputable brand with third-party purity testing
- ALA from plant sources is poorly converted, do not rely on flaxseed alone
NuLine conducts anti-inflammatory skin condition research. Learn about current trials.