During my visit with prostate cancer (fine now, thanks) my doctor recommended a book "The ABCs of Nutrition and Supplements for Prostate Cancer". That, with other highly regarded internet information (what popped first in Google) led me to restricting my supplements to a silver multivitamin, C, and glucosamine chondroitin. I've had periods where I've added this or that, with no noticeable QOL improvement, and I wonder if we can actually metabolize the large doses normally sold. That said, my +80yo mom in law uses all kinds of peculiar supplements and is happy/healthy as a horse. So who knows?