US Pharm. 2015;40(4):7.
San Diego, CA—Researchers at the University of California, San Diego (UCSD) and Creighton University have challenged the recommended dietary allowance (RDA) for vitamin D from the Institute of Medicine (IOM). They have confirmed a calculation error noted by other investigators, suggesting that the IOM underestimated the requirement substantially. The current RDA for vitamin D is 600 IU/day for those aged ≤70 years, and 800 IU/day for older persons. These dosages seem to be only about one-tenth of what is needed to cut incidence of diseases related to vitamin D deficiency. The researchers call for the IOM and other public health authorities to designate a value of approximately 7,000 IU/day, which is still within safe levels.
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