Way back in 1941 a doctor named Dr. Frank Apperly found that people living closer to the equator had less of a risk of cancer. With all of the hype about making sure that we all use sunscreen and stay out of the sun, you would think it would be the other way around.
Since this time it has been found that the link to the lower cancer numbers in lower latitudes is none other than Vitamin D. How the skin converts sunlight to vitamin D. Some studies even indicate that those people with darker skin tones may be at higher risk of vitamin D deficiency related diseases (not just rickets, but other milder problems, too) because it is more difficult for them to convert rays to the crucial fat soluble vitamin. In fact, vitamin D deficiency has been linked to everything from dermatitis to cancer to heart disease.
This is one vitamin that is sure to be popular as 2009 goes on!