Vitamin D, from food sources, must have two ________ groups added to its structure before it can be used by the cells.

Question

Quizplus · Accepted Answer

Vitamin D from food sources or produced in the skin must undergo two hydroxylation reactions in the body to become active. The first occurs in the liver, where vitamin D is converted to 25-hydroxyvitamin D, and the second occurs in the kidney, where it is converted to its active form, 1,25-dihydroxyvitamin D.

Vitamin D, from Food Sources, Must Have Two ________ Groups