2020 DOI: 10.20944/preprints202008.0685.v1 View full text Preprint
Mark S. Rybchyn, Myriam Abboud, David A. Puglisi, Clare Gordon-Thomson, Tara C. Brennan-Speranza, Rebecca S. Mason, David R. Fraser

Abstract: Vitamin D, unlike the micronutrients, vitamins A, E and K, is largely obtained, not from food, but by the action of solar UV light on its precursor, 7-dehydrocholesterol, in skin. With the decline in UV light intensity in winter, most skin production of vitamin D occurs in summer. Because no defined storage organ or tissue has been found for vitamin D, it has been assumed that adequate vitamin D status in winter can only be maintained by oral supplementation. Skeletal muscle cells have now been shown to incorp…

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