Agent Name

Vitamin D

CAS Number

1406-16-2

Formula

Unspecified

Major Category

Biological Agents

Synonyms

Activated ergosterol; [ChemIDplus]

Category

Vitamins and Derivatives

Sources/Uses

"A vitamin that includes both CHOLECALCIFEROLS and ERGOCALCIFEROLS, which have the common effect of preventing or curing RICKETS in animals. It can also be viewed as a hormone since it can be formed in SKIN by action of ULTRAVIOLET RAYS upon the precursors, 7-dehydrocholesterol and ERGOSTEROL, and acts on VITAMIN D RECEPTORS to regulate CALCIUM in opposition to PARATHYROID HORMONE." [ChemIDplus] Used as a nutritional supplement; [FDA]

Comments

Excessive, chronic ingestion can lead to hypercalcemia (weakness, altered mental status, GI symptoms, kidney injury, and possibly cardiac arrhythmias); Serum levels of 25-hydroxy vitamin D may useful in diagnosis; [Olson, p. 397]

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