Which vitamin is essential for the absorption of calcium in older adults?

Vitamin D is essential for the absorption of calcium in older adults due to its role in enhancing intestinal absorption of calcium from the diet. As individuals age, their skin becomes less efficient at synthesizing vitamin D from sunlight, and dietary intake often falls short. This deficiency can lead to decreased calcium absorption, which in turn may contribute to bone health issues such as osteoporosis and fractures. Therefore, ensuring adequate levels of vitamin D is crucial for older adults to maintain proper calcium metabolism and overall bone health.