Do fish oils REALLY keep the brain young?

Fish oil supplements are taken by millions of people to keep their wits sharp as they age. But doubts have emerged as to whether the capsules actually do anything to slow mental decline. A study of 4,000 people found no evidence omega-3 supplements helps people maintain their brain power. Scientists tracked the patients for five years, finding that the whole group declined at roughly the same rate, no matter whether they had taken the supplements.

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