The current recommended dietary requirement for vitamin D intake (200 IU/d) during pregnancy and lactation is based on little, if any, scientific evidence, and as a result is clinically irrelevant with respect to maintaining nutritional vitamin D status during these demanding human conditions. Current research has shown that the actual dietary requirement during pregnancy and lactation may actually be as high as 6000 IU/d. Current data on which these new recommendations could be based are presented.
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Bruce W. Hollis (2007) studied this question.
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