Vitamin D
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Vitamin D is a group of structurally related, fat-soluble compounds responsible for increasing intestinal absorption of calcium and phosphate, along with numerous other biological functions. In humans
Children being given cod liver oil, Cambridgeshire, England, 1944
Scott's Emulsion of Pure Cod Liver Oil Trade Card
X-ray of the legs of a two-year-old child with rickets showing bowing of the femur and low bone density
Calcium and Vitamin D3 are often combined, with claims for adult bone health. (This label predates current US Food and Drug Administration regulations on health claims.))
Vitamin
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Vitamins are organic molecules that are essential to an organism in small quantities for proper metabolic function. These essential nutrients cannot be synthesized in the organism in sufficient quanti
Vitamin D
…The name Vitamin D is a misnomer; technically vitamin D is not a vitamin, but rather a fat-soluble secosteroid hormone. Unlike the other twelve vitamins, vitamin D is only conditionally essential in the diet, as with adequate skin exposure to the ultraviolet B (UVB) radiation component of sunlight there…
A bottle of B-complex vitamin pills
Calcium combined with vitamin D (as calciferol) supplement tablets with fillers.