"A substance found in fish oil may be associated with a significantly reduced risk of developing Alzheimer’s and other dementias, researchers reported yesterday.

The scientists found that people with the highest blood levels of an omega-3 fatty acid called docosahexaenoic acid, or DHA, were about half as likely to develop dementia as those with lower levels."

Fish Oil Linked to Lower Alzheimer’s Risk

Plasma Phosphatidylcholine Docosahexaenoic Acid Content and Risk of Dementia and Alzheimer Disease