I got this product for my husband because I thought it might be an easy and inexpensive fertility enhancer for the three months or so that it takes to build a sperm before trying to conceive. I was surprised when after a month or two of daily use I noticed a positive difference. It turned the clock back 10 years for my perfectly fine 30 year old husband, which wasn't something we were expecting or even thinking about. Kind of a subtle change, but pretty fun. We conceived on our first cycle of trying.