Omega-3 Fatty Acids and Subconcussive Head Impacts

Inclusion Criteria: * Between age 18-30 * Current or former soccer player * At least 5 years of soccer heading experience * Have internet access * Willing to commit to avoid any sport activity that purposefully uses one's head to maneuver during the study period (American football, ice-hockey, rugby, wrestling, and soccer heading). Exclusion Criteria: * Any head or neck injury within 6 months before the study * Implanted metal/magnetic devices (e.g., orthodontic braces * Diagnosed autonomic or cardiovascular diseases (e.g., hypertension) * Consuming oily fish (2 servings or more/month: salmon, bluefin, swordfish, anchovies) * Allergy to fish or shellfish * Consuming omega-3 FA supplements including plant-based (e.g., flaxseed) in the past 3 months. * Pregnancy