'''Calcitriol''', or '''1,25-dihydroxycholecalciferol''' is the biologically active metabolite of vitamin D. It is classified as a steroid hormone and acts to raise blood calcium levels. | '''Calcitriol''', or '''1,25-dihydroxycholecalciferol''' is the biologically active metabolite of vitamin D. It is classified as a steroid hormone and acts to raise blood calcium levels. |