It's worse than that. There is reasonable evidence that vitamin D deficiency contributes to a number of cancers and that heavy use of sunscreen has a questionab

It's worse than that. There is reasonable evidence that vitamin D deficiency contributes to a number of cancers and that heavy use of sunscreen has a questionable benefit on net mortality rates. http://www.medpagetoday.com/HematologyOncology/SkinCancer/7888 http://www.medpagetoday.com/HematologyOncology/SkinCancer/78...