D vitamini is a fat-soluble vitamin that plays a crucial role in maintaining healthy bones and teeth. It helps the body absorb calcium and phosphorus, which are essential minerals for bone health. The body can produce D vitamini when the skin is exposed to sunlight, making it unique among vitamins. In addition to sunlight, D vitamini can be obtained from certain foods, such as fatty fish, egg yolks, and fortified dairy products. It is also available as a dietary supplement. Adequate levels of D vitamini are important for overall health, as deficiencies can lead to bone disorders like rickets in children and osteomalacia in adults.