Ok, let me be clear this is my friends review to me on it. I love SNS products, but everyone will respond differently. He didn't change anything in his daily routine. He said he noticed a little more pep in his step when it came to workouts, but nothing in the libido department. He is 32 and has a very good libido already, especially since his wife doesn't like to give it up much to him. Lol! He tried one bottle of this.