 Well, when we use the word vitamin, it's actually kind of a misnomer because vitamin D is actually a hormone, and this regulates thousands of genes in the body, everything from pain, blood sugar, immune system, blood pressure, bone strength. Plus, vitamin D has been linked to maintaining colon health, breast, prostate, and ovarian health. But I'll tell you what, the way we're taking vitamin D is all wrong. It's all messed up.