B Vitamins Don't Prevent Alzheimer's Disease

Taking B vitamins doesn't slow mental decline nor will it prevent Alzheimer's disease, according to clinical trial data involving 22,000 people. High levels in the blood of a compound called homocysteine have been found in people with Alzheimer's disease, and people with higher levels of homocysteine have been shown to be at increased risk of Alzheimer's disease. Taking folic acid and vitamin B-12 are known to lower levels of homocysteine in the body, so this gave rise to the 'homocysteine hypothesis' that taking B vitamins could reduce the risk of Alzheimer's disease. read more

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