"Potent product. I could literally feel the difference after approximately 2 weeks of taking it. Enhanced mental clarity and focus plus increased physical stamina. I wasn't on a disciplined fitness regimen, although that was my intent when starting, I looked and felt better plus I gained approx 4 pounds of lean mass over the course of one bottle. At the new lower price it's definitely worth it I'm ordering again. Some of the other so called HGH Boosting Supplements are actually nothing but overpriced amino acids. If you compare the active ingredients you will definitely see that this one has more active ingredients and more per dose. Oh and they also cite a lot of supporting clinical studies from PubMed.gov to support the product claims if your into that kind of stuff."