We have known for quite a while that Vitamin D is a potent pro-hormone in the body, responsible for many beneficial effects. One of these effects is cancer prevention. Furthermore, the developing science is that it can prevent RECURRENCE also! The best plan is to maintain Vitamin D levels before any cancer is evident, but new research shows that higher levels achieved as soon as possible in the disease process can improve prognosis in the fight against cancer.
Studies gone bad have alerted us to the fact that some supplements, especially in higher doses, can have no effect or even CAUSE cancer rather than help fight or prevent it. The thought was simple and noble and is the reason we do clinical research studies rather than rely totally on animal studies or laboratory research in test tubes and Petri dishes. What SHOULD work well might be disastrous.