Vitamin D

More info On Vitamin D:
_Several studies observing large groups of people found that those with higher vitamin D levels also had lower rates of cancer. For some of these studies, doctors had blood samples to measure vitamin D, making the findings particularly strong. Even so, these studies aren't the gold standard of medical research — a comparison over many years of a large group of people who were given the vitamin with a large group who didn't take it. In the past, the best research has deflated health claims involving other nutrients, including vitamin E and beta carotene.
_Lab and animal studies show that vitamin D stifles abnormal cell growth, helps cells die when they are supposed to, and curbs formation of blood vessels that feed tumors.
_Cancer is more common in the elderly, and the skin makes less vitamin D as people age.
_Blacks have higher rates of cancer than whites and more pigment in their skin, which prevents them from making much vitamin D.
_Vitamin D gets trapped in fat, so obese people have lower blood levels of D. They also have higher rates of cancer.
_Diabetics, too, are prone to cancer, and their damaged kidneys have trouble converting vitamin D into a form the body can use.
_People in the northeastern United States and northerly regions of the globe like Scandinavia have higher cancer rates than those who get more sunshine year-round.