Template:Metabolism of vitamins, coenzymes, and cofactors

Fat soluble vitamins

Vitamin A	* Retinol binding protein
Vitamin E	* Alpha-tocopherol transfer protein
Vitamin D	* liver (Sterol 27-hydroxylase or CYP27A1) renal (25-Hydroxyvitamin D₃ 1-alpha-hydroxylase or CYP27B1) degradation (1,25-Dihydroxyvitamin D₃ 24-hydroxylase or CYP24A1)
Vitamin K	* Vitamin K epoxide reductase

Water soluble vitamins

Niacin (B₃)

Nonvitamin cofactors