In a previous post I explained how during a recent doctor’s visit with one of my prostate cancer clients I asked the question if supplementation with Vitamin D could slow the progression of disease. The healthcare provider said it could be helpful in lowering risk of disease, however, there were no human studies that showed it benefited men with low-grade disease on active surveillance. Well, I pulled out my tablet and did a quick search of the medical literature while the doc and patient (my client) continued discussing other topics.  I came across an interesting study, which is discussed below. Do high doses of vitamin D slow progression of prostate cancer? 43 Men diagnosed with low-grade prostate cancer, and on active surveillance, had a biopsy to remove portions of the prostate so it could be examined for evidence of disease (NOTE:  active surveillance means