I am a 65 year old male. I saw the advertisement for Advanced Amino and thought that I would give it a try. I bought a three bottles and started taking five tablets a day, as was directed on the bottle. Now I have been having constant pain in my back and knees, which was not going away. My doctor checked out my back and said it was a muscle problem and gave me core strengthening exercises to do. Whenever I do some physical work, my body tells me that I'm not able to do the things that I could do when I was younger and get away with it. What I have found in taking Advanced Amino is that the pain in my back and knees is gone. If I do heavy work, I will feel pain later in the day, but by the next day I will have recovered. If I don't take the Advanced Amino tablets for a few days, the pain comes back. I start taking them again and the pain goes away. My quality of life has hugely improved with Advanced Amino, so I can verify that it is very effective.