Vitamin D is essential for the absorption of calcium in the body. It plays a crucial role in maintaining healthy bones and teeth by facilitating the intestinal absorption of calcium and phosphorus. A deficiency in vitamin D can lead to brittle bones, increasing the risk of fractures and conditions such as osteoporosis. Sunlight exposure is a significant source of vitamin D, but it can also be obtained from dietary sources like fatty fish, fortified products, and supplements. Maintaining adequate levels of vitamin D is pivotal for optimal bone health.