Calcium and Phosphate Hormones: Vitamin D, Parathyroid Hormone, and Fibroblast Growth Factor 23 - AAP News

Physiology: Vitamin D Production and Action

Vitamin D is a precursor molecule to a critical hormone, calcitriol, involved in calcium and, to a lesser extent, phosphorus metabolism. It is not actually a vitamin because it can be produced in skin from 7-dehydrocholesterol by UV-B radiation. The product of this transformation is termed cholecalciferol or vitamin D₃. This process is self-regulating, preventing vitamin D intoxication even in the setting of large amounts of sunlight exposure. A very similar compound, ergocalciferol (also called vitamin D₂) is derived …

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"Vitamin" - Google News
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Calcium and Phosphate Hormones: Vitamin D, Parathyroid Hormone, and Fibroblast Growth Factor 23 - AAP News
"Vitamin" - Google News
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