Are produced vitamin (d) in the human body due to exposure to sunlight and can be found in foods such as fish, eggs and cow's milk and fortified. Despite the relative ease with which the body absorbs and creates this vitamin, and research suggests that vitamin (approximately half of the population D-minus. Therefore, the majority of doctors recommend that everyone takes Supplement Vitamin (d) a day. This can occur Supplement reduce the risk of rickets developing, and osteomalacia, and certain forms of cancer, and can enhance the immune system as well as providing other benefits.Vitamin Public Health d deficiency is one of the main causes of rickets, a disease that childhood, which hampers the growth of bone. This is because the main function of the vitamin (d) in the human body is to maintain normal levels of calcium and phosphorus in the blood, which helps in the absorption of calcium, thus creating and maintaining strong bones. vitamin D deficiency is also associated with disruption of thinning of the bones known as osteomalacia, which causes muscle weakness and fragile bones in adults. can be avoided by these conditions by taking a daily supplement of vitamin (d). Research has shown that taking vitamin (d) daily supplement, whether in the form of vitamins or of his own, and can reduce the risk of certain types of cancer, including colon cancer and breast cancer and ovarian cancer. had cancer patients who take daily supplement of vitamin (d) I noticed a slight decline in the development of cancer. Vitamin (d) has also been shown to boost the immune system by increasing the production of peptides that fight bacteria, viruses and fungi. The lack of vitamin (d) One of the main reasons that influenza are very common during the winter months, because of the lack of people from exposure to sunlight.