Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Simplified metabolism of vitamin D. Vitamin D3 is synthesised in the skin from 7-dehydrocholesterol, hydroxylated to 25(OH)D3 in the liver, and converted to 1,25(OH)2D3 in the kidney. 25(OH)D3 and 1,25(OH)2D are converted by 24(OH)ase to 24,25(OH)2D and 1,24,25(OH)3D.
blue arrows, enzyme pathways; green arrows, pathway activation/inhibition.
