Vitamin D3 is the primary raw material to make active and usable vitamin D. It is produced when the body is exposed to sunlight (ultraviolet B radiation sunlight). Our bodies are amazingly efficient when it comes to producing vitamin D3; brief sunlight exposure of the arms and face will enable our body to produce 200 international units (IU) of vitamin D3. The precise amount of vitamin D3 produced will vary depending on factors such as skin type, geographical location, season, and time of the day. Vitamin D can also come from our diet but there are very few foods in nature that contain it. The best sources of Vitamin D in nature are fatty fish like salmon, tuna, mackerel, as well as cheese, mushrooms, apples, egg yolks, sardines and fortified foods. Finally, supplements are a potent source of Vitamin D and raise blood levels effectively.
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