Essential Biochemistry - Vitamins (Section 3 - No. 41)
What is the immediate precursor to the active form of vitamin D in the kidney?
7-dehydrocholesterol
Cholecalciferol
25-hydroxycholecalciferol
Ergocalciferol
הֶסבֵּר
25-hydroxycholecalciferol is the precursor of the active form in the kidney.