I am someone that is big on supplements to help repress prostate cancer. But I think one must consider articles like the link on this post when taking supplements.
I take 5mg of rosvastatin and have for years. During that time my PSA has gone up and down, and up, and down. So, I keep taking it because it has been a constant over the years and it doesn't seem to influence my PSA reading.
PSA is an important indicator of what the cancer is doing, but it may not be totally reliable as the cancer mutates into nonPSA producing cells.