Omega-3s Don't Just Reduce Inflammation — They Change Your Mood

Most athletes take fish oil because they've heard it's "good for inflammation." That's true, but it dramatically undersells what omega-3 fatty acids actually do in the nervous system. The EPA fraction of fish oil — eicosapentaenoic acid — is particularly interesting because it crosses the blood-brain barrier and directly modulates neuroinflammatory pathways that affect serotonin and dopamine signaling.

Liao et al. published a meta-analysis in Translational Psychiatry covering 26 RCTs with over 2,000 participants. They found that EPA supplementation at doses above 1,000mg per day produced statistically significant reductions in depressive symptoms. The effect size was clinically meaningful — comparable to some first-line antidepressant medications. What's important is that this effect was specific to EPA, not DHA. DHA is critical for brain structure, particularly cell membrane integrity, but for mood regulation the data point clearly toward EPA as the active component.

For athletes, this matters beyond mood. Neuroinflammation impairs cognitive performance, reaction time, and decision-making under pressure. It also disrupts sleep architecture. Athletes in high-contact sports or those training at very high volumes carry more neuroinflammatory load, which makes adequate EPA intake even more relevant. The typical Western diet provides roughly 100–200mg of EPA daily. The therapeutic range is 1,000–2,000mg.