The only Prostate suppliment I had taken in the past is one that advertises heavily on radio. After about a year of use I did not feel the small gains in performance were worth the continued use. I shopped around and found several choices here at iHerb. I chose Doctors Best for it's unique combination of ingredients. After the first week of use I noticed improvement. I haven't finished the first bottle yet, but just 3 weeks of use and I am sleeping better and everything is working better than in 3 years. So I am more than happy with this product and recommend it.