FIGURE 3-2 Photochemical events that lead to the production and regulation of vitamin D3 (cholecalciferol) in the skin.
NOTE: DBP = vitamin D binding protein.
SOURCE: Holick (1994). Reprinted with permission from the American Journal of Clinical Nutrition (1994, volume 60, pages 619-630), American Society for Nutrition.
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3 Overview of Vitamin D ."
Dietary Reference Intakes for Calcium and Vitamin D . Washington, DC: The National Academies Press,
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