Prostate cancer is more prevalent in higher latitudes. This has been correlated with Vitamin D metabolism and its effect on tissue differentiation.
Autopsies have shown that incidental prostate cancer is noted in 30% of men in the 6th decade of life and increases significantly through the ninth decade. These data have been reproduced in populations for several areas in the world. Recent studies also suggest that this significant sub-clinical level of prostate cancer is present in men as early as the fourth decade of life.
Joel T. Nowak, M.A., M.S.W.