Figure 1.
Overview of the vitamin D metabolism. 25(OH)D, Calcidiol; 1,25(OH)2D3, Calcitriol; CYP2R1, cytochrome P450 2R1; DBP, Vitamin D binding protein. Parts of the figure were drawn by using pictures from Servier Medical Art.
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.