Vitamin D: Difference between revisions
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Several forms ([[vitamer]]s) of vitamin D exist. The two major forms are vitamin D<sub>2</sub> or ergocalciferol, and vitamin D<sub>3</sub> or cholecalciferol. Vitamin D without a subscript refers to either D<sub>2</sub> or D<sub>3</sub>, or both, and is known collectively as calciferol. | Several forms ([[vitamer]]s) of vitamin D exist. The two major forms are vitamin D<sub>2</sub> or ergocalciferol, and vitamin D<sub>3</sub> or cholecalciferol. Vitamin D without a subscript refers to either D<sub>2</sub> or D<sub>3</sub>, or both, and is known collectively as calciferol. | ||
Vitamin D<sub>2</sub> was chemically characterized in 1931. In 1935, the [[chemical structure]] of vitamin D<sub>3</sub> was defined and shown to result from the [[ultraviolet|ultraviolet irradiation]] of 7-dehydrocholesterol. A chemical nomenclature for vitamin D forms was recommended in 1981, but alternative names remain in common use. | Vitamin D<sub>2</sub> was chemically characterized in 1931. In 1935, the [[chemical structure]] of vitamin D<sub>3</sub> was defined and shown to result from the [[ultraviolet|ultraviolet irradiation]] of 7-dehydrocholesterol. A chemical nomenclature for vitamin D forms was recommended in 1981, but alternative names remain in common use. | ||