vitamin D

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Fat-soluble sterols, calciferol, and related substances are produced in the skin by the action of solar radiation. These are essential enzymes in calcium metabolism and in the formation and continuing integrity of bone structure. Deficiency causes rickets and osteomalacia. For dietary requirements and other information, see http://ods.od.nih.gov/factsheets/vitamind.asp.

Subjects: Medicine and Health — Chemistry.

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