People are often on the lookout for ways to improve brain health and possibly prevent cognitive problems like dementia . One area of interest in the research is docosahexaenoic acid (DHA) , an omega-3 fatty acid that people can get from fish and supplements.
A recent study published in eBioMedicine explored whether taking DHA supplements held cognitive benefits for people who had lower levels of omega-3 intake. Researchers found that while supplementation did increase DHA levels, participants did not show benefits when it came to brain changes and cognition.
The findings suggest that DHA supplements alone may not help with dementia prevention. As noted in this study, people who have the APOE ε4 allele have a higher genetic risk for developing Alzheimer’s disease .
People with APOE ε4 status also tend to have lower levels of DHA, and lower DHA is also linked to late-onset Alzheimer’s disease . Researchers of the current study wanted to see if supplementing with high-dose DHA before the onset of dementia could be helpful.
The trial was a randomized, double-blind, single-center phase 2 placebo-controlled study.
Medical News Today published a clinical update in Research Highlights on 23 Jun 2026.
The item focuses on Omega-3 supplement may not offer benefits for Alzheimer’s prevention.
Review the original article for the full source wording and details.