Summary
Folic acid has long been known to protect against spina bifida and other birth defects. And now researchers are finding evidence that, taken in large quantities, it can prevent high blood pressure too. Results of a recent study need much more consideration, experts say, but the results seem to show what has long been suspected: women who consumed about 1,000 micrograms per day of folate, had lower blood pressures, on average, than other women.
Original source:
http://www.time.com/time/magazine/article/0,9171,1019871,00.html
Details
- 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.
- 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 younger women, significantly lower.
- The report, part of the ongoing Nurses' Health Study, tracked the folate intake of nearly 94,000 women ages 27 to 44 over eight years and found that those who consumed at least 1,000 micrograms a day had a 46% lower risk of high blood pressure than women who took less than 200 a day.
- It's not yet clear how folic acid does this, although the supplement is known to reduce levels of homocysteine, a blood component that can damage blood vessels.
- Men haven't yet been studied as thoroughly, but there's no reason to think they wouldn't get the same benefit from high doses of folate.
- Dr. John Forman of Brigham and Women's Hospital in Boston, the principal investigator, isn't ready to say that everybody should take 1,000 micrograms of folate a day.
- He wants to see his findings confirmed in a large, randomized trial in which half the subjects take the supplement and half take a placebo.
- Other scientists caution that early studies suggesting that large doses of vitamin E protect against heart disease haven't panned out.
- But since 65 million Americans suffer from high blood pressure, and there isn't any known downside to taking folate, it might not be a bad idea for all adults to take the current recommended dose of 400 micrograms a day.
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