Folate (B-vitamin) levels and brain function

In this two-part study, doctors measured folate levels and assessed mental ability in 593 older men and women and, in the second part, analyzed results from 12 folate studies covering 9,747 older people. Among the 593 participants, those with low folate levels were more likely to have impaired brain function. In the 12 other studies, doctors found those with low levels of folate were 66 percent more likely to have impaired brain function compared to those with healthy folate levels.

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