Article Date: 05 may 2013-0:00 PDT current ratings for:
Investigators require caution with vitamin D supplements
In recent years, healthy people were bombarded by stories in the media and on the sites of health warning on the dangers of levels too low vitamin D and urging the high doses of supplements to protect against everything from hypertension to arteriosclerosis in diabetes.
But the new research finds of Johns Hopkins, who have lower levels of the so-called "sunshine vitamin" blood above the top of the range proposed by the Institute of medicine provide no additional benefit. This fact, combined with the results of an earlier study by the same group, noting possible damage of higher levels of vitamin D in healthy people, urged investigators to prescribe caution.
"Healthy people have jumped these pills, but they should not continue taking vitamin D supplements not checked," said the head of the study Muhammad Amer, M.D., M.H.S., an Assistant Professor in the Division of general internal medicine at the Johns Hopkins University School of Medicine. ?At a certain point, more vitamin D is no longer confers a survival advantage, so taking these supplements cost is, at best, a waste of money.?
Amer stresses that there are certain groups of people - elderly postmenopausal women and people suffering from diseases of the kidney - benefiting from higher levels of blood of a vitamin essential for bone health. These groups may need to take supplements.
In an article published online in the American Journal of Medicine, bitter and Rehan Qayyum, M.D., M.H.S., also of Johns Hopkins, describe the review of data from more than 10,000 participants from the National Health and Nutrition Examination Survey (NHANES) from 2001 to 2004. They compared these data with mortality data from the National index of death until December 2006.
When they looked at the deaths of all causes and cardiovascular disease, specifically, those with blood levels of 21 nanograms per milliliter of 25-hydroxyvitamin D - at the top of the beach of IOM considers "appropriate" and at the lower end of the 'normal' - reduced their risk of mortality by half. Above 21 nanograms per milliliters, the data suggest that the protective effect seems to fade.
The main source of vitamin D is the Sun, and although it is found naturally in foods very little, commercially available milk is usually fortified with it. Amer said that people spend more time indoors and slather their bodies with sunscreen when outdoors, concern is increasing that many are deficient in vitamin D. But, he said, it did not amount fixed by supplementation can someone bring up 21 nanograms per millilitre because the way of deal with people vitamins varies.
In a research published in January 2012 in the American Journal of Cardiology, Amer and Qayyum found that increasing levels of vitamin D in the blood are associated with lower levels of a popular marker for cardiovascular inflammation - protein c - reactive (CRP), also known as. Beyond the levels of 21 nanograms per milliliter of blood, any additional increase in vitamin D has linked to an increase in CRP, a factor related to the hardening of the blood vessels and an increased risk of cardiovascular problems. Unpublished research team of also suggests a link between excess vitamin D and high homocysteine levels, another sign of cardiovascular disease risk.
People should consult their doctor, said Amer, before starting supplements of vitamin D and should have checked their blood level. However, he said, "most people in good health are unlikely to find that supplementation prevents cardiovascular disease or prolongs their life", and there is no consensus among doctors on what is the right level of vitamin D in the blood for people in good health.
"There are many myths out there and not enough data", he concludes.
Article adapted by Medical News Today press release original. Click on "references" tab above for the source.Visit our nutrition / diet section for the latest news on this subject. Work of Qayyum is supported by a grant from the National Heart, Lung, and Blood Institute (1K23HL105897-01).
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May 6. 2013
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Posted by Weston price may 5, 2013 at 11:38
Vitamin D we not an expensive supplement to 1-2 cents / day / 2000 IU by costco. In addition, research indicates that only 1000 IU per day reduce the rates of cancer by 50% after 3 years, eliminating tens of billions of annual expenses and the medical benefits cut. Do the math on why doctors want to avoid vitamin d. I'm surprised that the article did not claim you should avoid exposure sunlight spread fear that your rate would be "dangerously" smashes.
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