Diagram showing the interaction of chemical compounds in the skin that produce and regulate vitamin D3.

FIGURE 3-2Photochemical 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.

From: 3, Overview of Vitamin D

Cover of Dietary Reference Intakes for Calcium and Vitamin D
Dietary Reference Intakes for Calcium and Vitamin D.
Institute of Medicine (US) Committee to Review Dietary Reference Intakes for Vitamin D and Calcium; Ross AC, Taylor CL, Yaktine AL, et al., editors.
Washington (DC): National Academies Press (US); 2011.
Copyright © 2011, National Academy of Sciences.

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