I am a 54 years, fit, like to run marathons and do crossfit. I had an injury in my hip and upperleg that just would not go away. I'v tried everything, physio, dryneedling, supplements, painkillers, nothing worked. My wife bought Advanced Amino for me and it works. After 3 months my injury was completly gone. I ordered my next shipment but the order got lost in the mail so I could not take Advanced Amino and my injury returned. So I will keep on taking Advanced Amino.