Translations:D-Hormon/1/en

The Pro-D hormone synthesized by the body itself is cholecalciferol or (formerly) vitamin D3. Under the influence of UV-B, this is produced in the skin from a cholesterol derivative which is formed in the liver. The actual active form of D3 is calcitriol, which is synthesized in the kidney. In the diet, D3 is mainly found in fatty fish or is added to foods as a dietary supplement.