The more common name for the above chemical is D3 as in Vitamin D (D3 aka cholecalciferol is the active form of Vitamin D). Why is it "to the rescue," you ask? There's been a bunch of studies over the past decade that have found that if people take more vitamin D, they have 25 percent less cancer and heart disease. As a result, doctors, mine for example, have been prescribing megadoses of vitamin D in their patients with low serum levels of cholecalciferol. Sometimes as much as 50,000 units per dose. The FDA, by contrast, is 400 units per day. What happens if you don't get enough? Well, a recent study found that people with the lowest levels of vitamin D in their blood are 26 percent more likely to die from any cause (heart disease and cancer being the headliners but even routine infections are more likely if you're deficient in vitamin D) than folks with respectable serum levels. A lot of these benefits are due to the upregulation of the P53 gene, which helps che...