Essential Biochemistry - Vitamins (Section 5 - No. 33)
Functions of vitamin D:
Vitamin D is an important role as a hormone in the regulation of calcium and phosphorus metabolism
Vitamin D promotes the intestinal absorption of calcium
Vitamin D promotes the mobilization of calcium and phosphorus from the bone
Vitamin D promotes the reabsorption of calcium and phosphorus from the kidney
Explanation
Vitamin D plays a key role in calcium and phosphorus metabolism by influencing calcium absorption in the intestines, calcium mobilization from bone, and calcium reabsorption in the kidneys.