Which vitamin is essential for calcium absorption?

Vitamin D is essential for calcium absorption because it plays a critical role in maintaining the balance of calcium and phosphorus in the body. This vitamin enhances the intestinal absorption of calcium, which is crucial for building and maintaining strong bones and teeth. Without adequate levels of vitamin D, the body struggles to absorb enough calcium from the diet, leading to potential bone health issues such as osteoporosis or rickets.

The other vitamins listed do not have the same direct role in calcium absorption. Vitamin A is important for vision and immune function, Vitamin B12 is essential for red blood cell formation and neurological function, and Vitamin C is crucial for collagen synthesis and acting as an antioxidant. While all these vitamins contribute to overall health, none of them specifically facilitate the absorption of calcium in the same way that vitamin D does.