What is the primary function of vitamin D in the regulation of calcium levels in the body?

A To increase calcium absorption in the gut ✓
B To decrease calcium excretion in the urine
C To regulate calcium release from bone
D To inhibit parathyroid hormone secretion

Explanation

Vitamin D plays a crucial role in maintaining calcium homeostasis by regulating its absorption in the intestine.

Source

Nutrition textbooks and research articles
Vitamins Nutrition Vitamin D and Calcium Regulation Medium MEDICAL Confidence: high