Our evolution and existence are dependent on exposure to sunlight. The sun’s ultraviolet rays should provide us more than 80 percent of our daily vitamin D requirement. However, over the past few decades, our exposure to sunlight has declined. This has led to an increasing incidence of vitamin D deficiency and the disorders associated with it. Consequently, the role of diet and dietary supplements has become more important. Vitamin D is not only needed to regulate calcium and phosphorus [FOSfor-russ] in the body, it also plays an important role in maintaining bone structure and general health.
