Washington: A new research from Johns Hopkins has found that blood levels of vitamin D or so-called "sunshine vitamin" higher than the top of the range suggested by the Institute of Medicine confer no additional benefit.This finding, combined with results of a previous study by the same group noting potential harm from higher vitamin D levels in healthy people, has urged investigators to prescribe caution."Healthy people have been popping these pills, but they should not continue taking vitamin D supplements unchecked," said study leader 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 no longer confers any survival benefit, so taking these expensive supplements is at best a waste of money," he added.Amer stresses that there are some groups of people - elderly, postmenopausal women, and people with kidney disease - who do benefit from higher blood levels of a vitamin vital to bone health. Such groups may need to take supplements.
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