The active form of vitamin D is:

Question

Quizplus · Accepted Answer

The active form of vitamin D is 1,25-dihydroxyvitamin D. Ergocalciferol and cholecalciferol are both precursors that must be metabolized in the body to become active vitamin D. 25-hydroxyvitamin D is also a precursor vitamin D metabolite, but it is not the active form. 1,25-dihydroxyvitamin D is the active form of vitamin D, which is produced in the kidneys from 25-hydroxyvitamin D. Ergocalciferol and cholecalciferol are both precursors of vitamin D, and while 25-hydroxyvitamin D is a commonly used marker of vitamin D status, it is not the active form.

The Active Form of Vitamin D Is