Folic acid is one of the more essential B vitamins, especially for women of childbearing age, and a little bit--100 micrograms a day--goes a long way toward preventing spina bifida and other birth defects. That's why the U.S. government requires that all grain products be fortified with enough folate to stave off these so-called neural-tube defects.
Now a major study published in the Journal of the American Medical Association has confirmed what smaller studies had only hinted at: that women who consume large amounts of folate (on the order of 1,000 micrograms a day) have a lower risk of developing hypertension--for...
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