👉 Vitamin D, often referred to as the "sunshine vitamin," is a fat-soluble vitamin that plays a crucial role in maintaining bone health, immune function, and overall well-being. It is synthesized in the skin upon exposure to ultraviolet B (UVB) rays from sunlight. These light particles, specifically UVB radiation, trigger a biochemical reaction within the skin cells, converting 7-dehydrocholesterol into pre-vitamin D3, which then transforms into vitamin D3 (cholecalciferol). Vitamin D is essential for calcium absorption in the intestines, helping to maintain strong bones and teeth by regulating calcium and phosphorus levels. Additionally, it supports immune system function, reducing the risk of certain diseases, and may have roles in cell growth and differentiation. Since the body can also obtain vitamin D from dietary sources like fatty fish, egg yolks, and fortified foods, exposure to sunlight remains a primary natural source, though careful balance is needed to avoid skin damage.
