Biochemistry The major storage and circulatory form of vitamin D is:- A 25-hydroxycholecalciferol B 1,25-dihydroxycholecalciferol C Cholecalciferol D Calcitriol 💡 Explanation The major storage and circulatory form of vitamin D is:- ✓ Correct Answer: A. 25-hydroxycholecalciferol