Nutrition & Diet

Fish Oil EPA May Impair Brain Recovery After Repeated Head Injuries

A new study from the Medical University of South Carolina challenges the idea that fish oil is universally good for the brain. Published in Cell Reports, the research found that EPA, one of the main omega-3 fatty acids in fish oil, may actually interfere with the brain's ability to heal after repeated mild head injuries. In lab models using mice and human brain cells, higher EPA levels were linked to weaker blood vessel repair, disrupted healing signals, and protein buildup associated with cognitive decline. Importantly, DHA, the other major omega-3, did not show the same harmful effects. Researchers describe this as a context-dependent vulnerability, meaning fish oil's impact on the brain may depend heavily on individual circumstances and injury history.