Vitamin D is a fat soluble vitamin. It is found in certain foods and also is synthesized by our bodies from sunshine.
Sunshine is the most important source of vitamin D - the UV rays in sunshine trigger the synthesis in our skin.
Vitamin D is now being touted as a vitamin capable of reducing cancer rates by as much as 60 - 70%, following rigorous scientific studies.
Improve your food sources of vitamin D. Be aware that this is a "supplement" and not a "substitute" for sunshine though, as it is generally not possible to get enough amounts of vitamin D through food alone. There are two possible food sources, namely foods that have been fortified with vitamin D during the manufacturing process and foods that contain vitamin D naturally:
* Fortified foods are usually milk and breakfast cereals. Read the nutrition labels to see if vitamin D has been added.
* The best source of food vitamin D is found in fish. Salmon, mackerel, tuna, and sardines are excellent sources. If you can stomach it, cod liver oil is also a good source.
* Egg yolks, margarine, cheese, and beef liver also have small amounts of vitamin D