| http://www.w3.org/ns/prov#value | - ???We know that vitamin D is an essential part of a healthy diet ??? and other groups have been clear that vitamin D at 800 IU is a dose that is essential, and most people can achieve with diet,??? says Dr. Bibbins-Domingo. ???What we are talking about is supplements, and what we can say is, at 400 IU, it is not helpful.
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