JOANNA HAYDEN, PHD, CHES
The results of a study published in the Journal of the American Medical Association last week found that about 3 percent of adults in the U.S. are taking more than 4,000 international units (IUs) (IU - is a unit of measurement) of Vitamin D a day, an amount beyond the upper limit considered safe. This is up from 0.2 percent 10 years ago. The recommended daily amount of Vitamin D is 600 IUs ...
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