Evidence check: Omega-3 Index in the context of Sport

The Omega-3 Index measures the percentage of EPA and DHA in red blood cell membranes and is a validated biomarker for long-chain omega-3 status. In sports, an index ≥8 % is associated with reduced inflammation, improved recovery, and possibly better cognitive function under physical stress. However, the evidence is moderate: some RCTs show benefits for muscle soreness and recovery, but effects on performance (endurance, strength) are inconsistent. Individual responses vary due to genetics (e.g., FADS1 variants), baseline status, and dosage. The Omega-3 Index is a useful tool for monitoring supplementation, but it should not be overinterpreted. MyBody-X may offer this test, but clinical validation specifically for athletes is limited. Caveat: High-dose omega-3 (>3 g/day) can prolong bleeding time; consult a physician before starting supplementation, especially if on anticoagulants.