Vitamin D plays a critical role in bone health by promoting the absorption of calcium and phosphorus, essential minerals for maintaining strong bones. It helps in the development of bone density and reduces the risk of osteoporosis and fractures. A deficiency in vitamin D can lead to weakened bones and increased susceptibility to diseases such as rickets in children and osteomalacia in adults. Therefore, adequate levels of vitamin D, obtained through sunlight exposure, diet, or supplements, are vital for overall bone strength and health.