Popular Supplement May Have an Unexpected Downside, Study Finds

A new mouse and cell study suggests EPA, a key omega-3 in fish oil, may hinder brain blood-vessel repair after head injury.

Injured mice fed EPA had worse memory and learning outcomes, along with signs of greater tau buildup.

Follow-up cell tests found EPA disrupted blood-vessel repair, while DHA did not show the same effect.

The findings suggest fish oil’s brain benefits may depend on the specific omega-3 type and injury context.