Vitamin D is a fat soluble vitamin, which means that it can be stored within the body for long periods of time. It is acquired through sunlight or diet. When the body is exposed to the sun, Vitamin D is considered to be both a vitamin and a prohormone because of its action with 7-dehydrocholesterol found underneath the skin. Ultraviolet sun rays act on the oils of the skin to produce the vitamin, which is then absorbed into the body. Vitamin D is necessary for the growth of strong bones and teeth through the proper utilization of calcium and phosphorus. Vitamin D1 is a specific form of Vitamin D and is also known as lamisterol and forms calciferol. Lumisterol is a compound that is part of the vitamin D family of steroid compounds. It is the (9β,10α) stereoisomer of ergosterol and was produced as a photochemical by-product in the preparation of vitamin D1, which was a mixture of vitamin D2 and lumisterol.
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