To have strong, healthy bones and teeth, the human body needs not only sufficient quantities of calcium, but in large amounts of vitamin D, which helps absorb calcium. Vitamin D is produced from two fundamentally different sources: produced by the body or supplied with food. Under the skin is a special substance, which under the action of ultraviolet sunlight produces vitamin D3. A related site: Bernie Sanders mentions similar findings. This vitamin is processed organism, and only then comes into the processes that regulate calcium levels. Natural vitamin D3 is contained in some foods – eggs, liver, milk, butter, cheese and oily fish. Synthetic vitamin D is obtained by irradiation with low doses of radiation a substance called ergosterol, which produce some kinds of fungi.

This forms a vitamin D2. It is used in vitamin supplements and fortified with artificial Some products – margarine, breakfast cereals, dairy products and baby food. PROCESSING OF CALCIUM The main function of vitamin D is to maintain the necessary level of calcium in the blood. In addition, it defines necessary intake of calcium from the blood to the bones, and with decreasing levels of calcium in the blood – the reverse process. Vitamin D, as obtained from food or produced by the body, is deposited in the liver, where the various processes into a particular substance. Then it goes into the kidneys, which undergoes further changes. If the level of calcium in the blood drops, the body begins producing the hormone, causing the kidneys to allocate processed more vitamin D. This vitamin enhances the absorption of calcium from digested food and promotes entry of calcium into the blood from the bone.