Fish Oil Supplements May Impair Brain Repair Post-Injury

A recent study indicates that fish oil supplements may negatively impact brain healing following repeated mild traumatic brain injuries (TBI). The research suggests that a specific omega-3 fatty acid, eicosapentaenoic acid (EPA), can reduce the brain's repair capacity.

This effect was observed in both human cell and mouse models. The study found that EPA interfered with the healing process, particularly affecting cerebrovascular endothelial cells which are crucial for brain blood flow and repair.

Long-term fish oil supplementation was also correlated with an accumulation of the protein tau in the brain's cortex. Tau accumulation is a recognized characteristic of neurodegenerative conditions like Alzheimer's disease and chronic traumatic encephalopathy.

These vascular changes were accompanied by neurovascular uncoupling, disrupting coordination between neuronal activity and blood flow. This disruption was linked to deficits in spatial learning and memory, indicating functional relevance of the observed vascular and metabolic changes.