A Guide To The D VitaminVitamin D is the only vitamin that is not obtained from foods that are consumed. Vitamin D is a group of fat-soluble secosteroids responsible for intestinal absorption of calcium and phosphate. Vitamin D appears to have effects on immune function. The lack of vitamin D synthesis during the winter can cause influenza. Low levels of vitamin D appear to be a risk factor for tuberculosis, and rickets in children. The two major forms of vitamin D are D2 and D3. Although vitamin D is commonly called a vitamin, it is not actually an essential dietary vitamin in the strict sense, as it can be synthesised in adequate amounts by most mammals exposed to sunlight.This app contians some important information about the vitamin D. The main ingredients of this app are:* # Sunlight as the source of vitamin D* # Functions of vitamin D* # The variants of vitamin D* # Food as a source of vitamin DThis app is useful for those people who want to gain some knowledge about the vitamins and minerals, especially about the vitamin D. This app explains the sources and the functions of vitamin D. People who are looking for a guide to vitamin D would find this app very helpful.So what are you waiting for??Download Now!!Note:No relevant information could be found regarding "vitamino".