Omega-3 Supplements May Increase Risk of Cognitive Decline, Scientists Warn

A Chinese observational study using ADNI data found omega-3 supplement users had a faster decline in cognitive scores than nonusers.

The effect was strongest in older adults with APOE ε4, a genetic risk factor for Alzheimer’s disease.

Researchers emphasized that the study shows an association, not causation, so it does not prove omega-3 supplements harmed cognition.

The findings challenge the idea that omega-3 supplements are universally protective for memory and brain health.