Vitamin D is an important nutrient used by the body to keep bones healthy and strong. A vitamin D deficiency can result in soft, thin, and brittle bones. This is often called rickets in children and may result in adult osteoporosis. Vitamin D helps the body absorb calcium, phosphorous, and magnesium - which it uses to strengthen bones. Vitamin D-3 (1500 IU) contains a bioactive form of vitamin D, cholecalciferol, which means that it is more easily absorbed and used by the body.
Vitamin D is also used by the body to fight viruses and bacteria. It is found in cells throughout the body. An Internal Medicine study showed that vitamin D deficiency is at an almost epidemic level, with three out of four Americans having vitamin D levels below what is needed for optimum health. A deficiency in Vitamin D negatively affects the growth and development of cells, teeth, bones, and hormone regulation. The symptoms can also affect the immune system and nervous system.
Vitamin D is used to treat diabetes, hypertension, and multiple sclerosis.