The omega-3s in fatty fish lower the risk for dementia and Alzheimer’s disease, according to a review of studies from researchers at Zhejiang University in China. The researchers included 21 studies on omega-3 intakes in this meta-analysis for a total of 181,580 participants and 4,438 cases of people with mild cognitive impairment, cognitive decline, dementia, Alzheimer’s disease, and/or Parkinson’s disease. Results showed that as little as one serving of fatty fish a week was enough to show a reduced risk for dementia and Alzheimer’s disease. Intakes of at least 1,000 milligrams of the omega-3 fat DHA was associated with a 14% lower risk of dementia and a 37% lower risk for Alzheimer’s disease.
Zhang Y, Chen J, Qiu J, et al: Intakes of fish and PUFAs and mild-to-severe cognitive impairment risks. American Journal of Clinical Nutrition 2015; December 30th.