25 - Hydroxycholecalciferol

25-hydroxycholecalciferol is the predominant form of vitamin D 3 in the blood. It is formed in the liver by hydroxylation (an enzyme of the endoplasmic reticulum vitamin D 3 -25-hydroxylase). It is absorbed from the blood by the kidneys (and partly by the bone marrow and placenta) and further hydroxylated to calcitriol.

related articles

 * Vitamin D
 * 1,25-dihydrocholecalciferol
 * Phosphate
 * Calcium