There are three products that I personally avoid because of their effect on the prostate. 1.- DAA works via NMDA receptors. The prostate has NMDA receptors. After two weeks on DAA my PSA more than doubled. 2. - Natradrol by LG Sciences. The only thing that this product has been proven to grow is the prostate. 3. - Epi because it targets ER beta receptors specifically.