Vitamin D supplements in Prostate Cancer

The latest newsletter of the Vitamin D Council pointed to a small study of Vitamin D3 supplementation for a year in low-grade prostate cancer.  It showed that at 4000 IU per day, the markers of cancer severity actually regressed.  But,..there were only 44 subjects in the study.  So, this is merely subjective.  Still, there is little to be lost in supplementing at 4000 IU.