Which vitamin is crucial for the absorption of calcium in the body?

• A. Vitamin C
• B. Vitamin A
• C. Vitamin D
• D. Vitamin B12

Answer: (C)

Vitamin D plays a critical role in the absorption of calcium in the body. It enhances the intestinal absorption of calcium and phosphorus, which are essential for maintaining healthy bones. When the body is exposed to sunlight, it synthesizes vitamin D, and this vitamin can also be obtained from certain foods and supplements. Without adequate levels of vitamin D, even the best dietary sources of calcium may not be effectively utilized, which can lead to weakened bone structure and an increased risk of fractures or conditions like osteoporosis. This relationship emphasizes why vitamin D is fundamental for ensuring that calcium is absorbed properly and utilized in various physiological functions, particularly in bone health.