“The levels of vitamin D commonly being used today barely reproduce what our grandparents got from their greater time outdoors. And even that is well below what would have been the vitamin D intake of early humans living in East Africa, where sunshine produced vitamin D year round. One should have thought that the proper approach would have been to recommend supplementation to the level of the ancestral intake and to shift the burden of proof to those who say that lower intakes are safe.” – Vitamin D expert Dr. Robert Heaney, in an essay about Vitamin D recommendations.

To read the full essay click here. 

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