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A Pilot Study of Vitamins to Lower Plasma Homocysteine Levels in Alzheimer Disease

OBJECTIVE: Authors determined the impact of high-dose vitamin supplements on plasma homocysteine levels in patients with Alzheimer disease (AD).

METHODS: Authors used an open-label trial of folic acid, vitamin B12, and vitamin B6, in combination for 8 weeks, with measurement of plasma homocysteine levels in the fasting state and after methionine-loading. A total of 69 subjects with AD were enrolled, including 33 who were taking standard multivitamin supplements; 66 were available at 8-week follow-up.

RESULTS: The high-dose vitamin regimen was associated with a significant reduction in fasting and post–methionine-loading homocysteine. Reductions were greater in the subgroup not using multivitamins, but were also significant in the multivitamin users.

CONCLUSION: High-dose vitamin supplementation reduces homocysteine levels in patients with AD. The effect of supplementation on rate of cognitive decline will be assessed later in a randomized, double-blind study.

Published on 02-27-2007