Based on this study alone, it appears as though vitamin D deficiency is directly correlated with poor health, including a serious chronic illness like cancer. Had these patients had optimal vitamin D levels, would they even have cancer in the first place? (Related: Check out this Vitamin D Infographic to learn more about the health benefits of vitamin D.)

While scientists have stopped short of claiming that vitamin D can protect against the development of cancer – they probably can’t say this, even if they do actually believe it, in order to get their papers published – they do admit that vitamin D deficiency is much more prominent among cancer patients than it is among the general population.

Study: Supplementing with vitamin D helps prevent cancer, especially if it’s taken more frequently – Dr. Eddy Bettermann MD