Which vitamin helps in the absorption of calcium from the intestines?

Vitamin D is essential for the absorption of calcium from the intestines. It plays a crucial role in maintaining adequate levels of calcium and phosphate in the body, which are vital for healthy bone formation and mineralization. When the body is exposed to sunlight, it synthesizes vitamin D, and it can also be obtained from certain foods.

One of the key functions of vitamin D is to enhance the intestinal absorption of calcium. It promotes the synthesis of calcium-binding proteins in the intestines, which increases the efficiency of calcium absorption into the bloodstream. Without sufficient vitamin D, even if dietary calcium intake is adequate, the body may not be able to absorb enough calcium to maintain healthy bone density. This is why vitamin D deficiency can lead to problems such as osteoporosis and rickets.

Other vitamins mentioned do not have a direct role in calcium absorption. For instance, B12 is primarily involved in red blood cell formation and neurological functions, while vitamin C is more associated with collagen synthesis and antioxidant functions. Vitamin K is crucial for blood clotting and bone metabolism but does not directly enhance calcium absorption in the intestines.