<unk> , also known as calcidiol, 25-hydroxycholecalciferol, or 25-hydroxyvitamin D3 (abbreviated 25(OH)D3), is a form of vitamin D produced in the liver by hydroxylation of vitamin D3 (cholecalciferol) by the enzyme vitamin D 25-hydroxylase.<unk>  can be further hydroxylated by the enzyme 25(OH)D-1α-hydroxylase, primarily in the kidney, to form calcitriol (1,25-(OH)2D3), which is the active hormonal form of vitamin D.<unk>  is strongly bound in blood by the vitamin D-binding protein. Measurement of serum<unk>  is the usual test performed to determine a person's vitamin D status, to show vitamin D deficiency or sufficiency.<unk>  is available as an oral medication in some countries to supplement vitamin D status.
Calcifediol
Gadobenic acid
Asciminib
Anagestone acetate
Chenodeoxycholic acid
Penmesterol
Colestyramine
Deferasirox