Metabolism of fat-soluble vitamins

Vitamins A, D, E, and K are classified as fat-soluble. Metabolic pathways by which dietary precursors of vitamins A and K are converted to active forms are annotated here. The conversion of 7-dehydrocholesterol is converted to active vitamin D is annotated as part of metabolism of steroids. (Vitamin E (tocopherol) is available in active form from the diet.)

Summary from Reactome (R-HSA-6806667), read 2026-09-23.