Vitamin D

RDA for vitamin D may be too low

According to researchers, the Recommended Dietary Allowance (RDA) for vitamin D, from the National Academy of Sciences Institute of Medicine, is underestimated by a factor of 10. Read…

Study: Too much vitamin D harmful

A study in the Journal of Clinical Endocrinology & Metabolism found that both too little and too much vitamin D can increase mortality. Read more.

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The rash from Rocky Mountain spotted fever usually begins to develop on which parts of the body?