Long-Term Fish Oil Supplementation May Impair Brain Recovery After Repeated Head Injuries
A new study warns that long-term fish oil use could hinder brain repair following repeated mild traumatic brain injuries, highlighting a specific risk linked to the omega-3 fatty acid EPA.
Key Findings
A study from the Medical University of South Carolina (MUSC), published in Cell Reports, indicates that long-term fish oil supplementation may impair brain recovery after repeated mild traumatic brain injuries (TBI). The research, led by neuroscientist Onder Albayram, identified a vulnerability linked to the omega-3 fatty acid eicosapentaenoic acid (EPA).
- EPA accumulation in the brain was associated with reduced repair capacity in blood vessels after injury. This effect was not observed with docosahexaenoic acid (DHA).
- In mouse models, long-term fish oil supplementation led to poorer neurological and spatial learning performance after repeated mild head impacts, along with perivascular tau accumulation in the cortex.
- In human brain microvascular endothelial cells, EPA reduced angiogenic network formation and endothelial barrier integrity under conditions that encouraged fatty acid engagement.
- Analysis of postmortem brain tissue from individuals with chronic traumatic encephalopathy (CTE) and a history of repeated brain injury showed disrupted fatty acid balance and transcriptional changes affecting vascular and metabolic pathways.
Implications
Albayram emphasized that the findings are context-dependent and do not constitute a universal recommendation against fish oil. The study highlights the need for precision in omega-3 supplementation, particularly for individuals with a history of repeated mild TBI. The researchers plan further investigation into EPA absorption, transport, and distribution.
Source
The study was conducted at the Medical University of South Carolina in collaboration with Cold Spring Harbor Laboratory Cancer Center and other institutions.