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Although they found that most of the supplements or diets were not associated with any harm, the analysis showed possible health benefits only from a low-salt diet, omega-3 fatty acid supplements and possibly folic acid supplements for some people. Researchers also found that supplements combining calcium and vitamin D may in fact be linked to a slightly increased stroke risk.
Results of the analysis were published on July 8 in Annals of Internal Medicine.
Surveys - Centers - Disease - Control - Prevention
Surveys by the Centers for Disease Control and Prevention show that 52% of Americans take a least one vitamin or other dietary/nutritional supplement daily. As a nation, Americans spend $31 billion each year on such over-the-counter products. An increasing number of studies -- including this new one from Johns Hopkins -- have failed to prove health benefits from most of them.
"The panacea or magic bullet that people keep searching for in dietary supplements isn't there," says senior author of the study Erin D. Michos, M.D., M.H.S., associate director of preventive cardiology at the Ciccarone Center for the Prevention of Cardiovascular Disease and associate professor of medicine at the Johns Hopkins University School of Medicine. "People should focus on getting their nutrients from a heart-healthy diet, because the data increasingly show that the majority of healthy adults don't need to take supplements."
Study - Researchers - Data - Trials - Vitamins
For the current study, the researchers used data from 277 randomized clinical trials that evaluated 16 vitamins or other supplements and eight diets for their association with mortality or heart conditions including coronary heart disease, stroke, and heart attack. All together they included data gathered on 992,129 research participants worldwide.
The vitamin and other supplements reviewed included: antioxidants, ?-carotene, vitamin B-complex, multivitamins, selenium, vitamin A, vitamin B3/niacin, vitamin B6, vitamin C, vitamin E, vitamin D alone, calcium alone, calcium and vitamin D together, folic acid, iron and omega-3 fatty...
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