Which vitamin is crucial for calcium absorption and bone health?

Vitamin D plays a vital role in calcium absorption and is essential for maintaining bone health. It facilitates the efficient absorption of calcium and phosphorus in the intestines, which are critical for building and maintaining strong bones. Without adequate vitamin D, the body struggles to absorb sufficient calcium from the diet, which can lead to weakened bones and conditions such as osteoporosis or rickets in children. This function highlights the importance of vitamin D, not only for overall bone integrity but also for various cellular functions and general health.

The other vitamins listed do not directly influence calcium absorption in the same way. Vitamin A is important for vision and immune function, Vitamin B12 is crucial for red blood cell formation and nerve function, while Vitamin C is necessary for collagen synthesis and immune support. Although each vitamin has its unique roles in the body, only Vitamin D is specifically linked to calcium absorption and bone health.