This is what I think about Advanced Amino Powder. I had a torn hamstring and some other problems with the left side of my chest. I took notice after using Advanced Amino Powder for 4-5 months that the tightness and pain in left side of my chest and muscle area improved some. When I stopped taking Advanced Amino Powder, it started getting a little worse again. This was the only way I could tell if your product really worked. I feel you have a good product, and I started taking it again. But, I wish your pricing would be more affordable. Because, their are times when I cannot afford to buy your product because of being strapped for money. That would be a great help. But, once again, I will say you have a good product.