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Evidence Review
Omega-3 Fatty Acids (Fish Oil)
Verdict
PromisingEvidence Tier
B
Moderate evidence
Human Studies
Yes — large trials with mixed results
Typical Cost
$10-30/mo
Omega-3 evidence is complicated. Some large trials (REDUCE-IT) show significant cardiovascular benefit; others (VITAL) show modest or no effect. The dose, formulation (EPA vs DHA), and baseline dietary intake all matter. Higher-dose EPA-only formulations show the strongest signal. At the population level, higher omega-3 index is consistently associated with lower mortality.
The full evidence review — including why the fish oil debate is more nuanced than "take it" or "skip it" — and which formulation matters — is in Section 10 (The Supplement Deep-Dive) of The Anti-Longevity Playbook.
Reviewed by Dr. Ramy Khalil, MD · Double Board-Certified Internal Medicine · Last updated March 2026
Should I take fish oil for longevity?
Evidence is mixed. REDUCE-IT showed significant cardiovascular benefit with high-dose EPA. Higher omega-3 index is associated with lower mortality. Dose and formulation matter significantly.
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