Why folic acid may prevent a first heart attack, but not a second

Wednesday, February 2, 2011 - 22:30 in Health & Medicine

A perplexing medical paradox now has an explanation according to new research. The paradox is that taking folic acid, a B vitamin, lowers homocysteine in the blood which, epidemiological evidence indicates, should lower the risk of heart attack, but clinical trials of folic acid have not shown the expected benefit.

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