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2008-06-10 10:38:45
By Will DunhamMon Jun 9, 4:10 PM ET
Men with low levels of vitamin D have an elevated risk for a heart attack,
researchers said on Monday in the latest study to identify important possible
health benefits from the "sunshine vitamin."
In the study, men classified as deficient in vitamin D were about 2 1/2 times
more likely to have a heart attack than those with higher levels of the
vitamin.
"Those with low vitamin D, on top of just being at higher risk for heart attack
in general, were at particularly high risk to have a fatal heart attack," study
author Dr. Edward Giovannucci of the Harvard School of Public Health and
Brigham and Women's Hospital in Boston said in a telephone interview.
The study involved 454 health professionals ages 40 to 75 who had suffered a
nonfatal heart attack or died of heart disease, as well as 900 other men with
no history of cardiovascular disease. They were followed for 10 years after
providing blood samples to measure their vitamin D levels.
The researchers compared those who were deficient in vitamin D -- no more than
15 nanograms per milliliter of blood -- to men who were in at least the lower
end of the normal range -- at least 30 nanograms per milliliter of blood.
The body makes vitamin D when the skin is exposed to sunlight. Milk commonly is
fortified with it, and it is found in fatty fish like salmon.
Vitamin D helps the body absorb calcium and is considered important for bone
health. In adults, vitamin D deficiency can lead to osteoporosis, and it can
lead to rickets in children.
A number of recent studies have indicated vitamin D also may offer a variety of
other health benefits, including protecting against types of cancer including
colon and breast cancer, peripheral artery disease and tuberculosis.
In January, researchers led by Dr. Thomas Wang of Harvard Medical School
reported findings that fit with the new study, showing that people with low
vitamin D levels have a higher risk for heart attack, heart failure and stroke.
Giovannucci said there is enough evidence about the value of vitamin D to
encourage people to ensure they have normal levels. He said people can learn
their vitamin D levels by having their doctor give them a blood test. Those
whose levels are too low can take vitamin D supplements, he said.
"Many people have low vitamin levels," Giovannucci said.
"Traditionally, physicians have only been concerned about the bone effects. But
perhaps having these chronically low levels of vitamin D may be having these
subtle physiological changes in a lot of tissues," Giovannucci added.
Giovannucci said there could be a number of ways in which vitamin D may protect
against heart attack. He said it might lower blood pressure, regulate
inflammation, reduce calcification of coronary arteries, affect the heart
muscle or reduce respiratory infections in winter.
The study was published in the journal Archives of Internal Medicine.
Posted: 2008629@769.76
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Lonnie Crawford
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nisqualli
http://www.cnn.com/2004/WORLD/europe/01/27/hague.babic.reut/
http://www.yorku.ca/bethune/history.html
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Leticia Austin
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nisqualli
>European Regions Knowledge Innovation Network
(ERIK)
>Arid Southwest Gardening Information
http://www.mozilla.org/press/mozilla-foundation.html
>Rajalakshmi Engineering College
http://www.csueastbay.edu/multimedia/
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Oscar Waters
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Micah Wolf
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Milagros Clarke
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Johnie Lindsay
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Fonda Hendricks
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