One of the best sources of vitamin D is exposure to sunlight. One must remember that sunlight itself does not contain vitamin D. Rather it is the 7-dehydrocholesterol present in the skin which is converted into vitamin D under the influence of the UV radiation from the skin.
It is now realized that the role of vitamin D goes beyond bone formation. Vitamin D deficiency can result in the onset of a number of disorders including Heart disease, diabetes and dementia. In many western countries, for several years people have been avoiding sunlight because of fears over skin cancer. One of the consequences of this has been the advent of vitamin D deficiency in the advanced societies. Doctors are partially responsible for this state of affairs. It is now realized that vitamin D obtained from sunlight is nactually protecting against the onset of skin cancer.
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