The primary,active form of vitamin D in the human body is
A) cholecalciferol.
B) calcidiol.
C) calcitonin.
D) calcitriol.

Question

Quizplus · Accepted Answer

The primary, active form of vitamin D in the human body is calcitriol, which is produced from calcidiol (also known as 25-hydroxyvitamin D) in the kidneys. Cholecalciferol, also known as vitamin D3, is the form of vitamin D that is synthesized in the skin in response to sunlight exposure. Calcitonin is a hormone produced by the thyroid gland that helps regulate calcium levels in the body, but it is not a form of vitamin D.

The Primary,active Form of Vitamin D in the Human Body