At 65, I was beginning to notice my weight and muscle mass declining. I am an otherwise healthy woman, so I had to do something about this right away. My research lead me to Advanced Amino Formula. In the 6 months I have been consistently taking this formula, I have noticed a steady improvement in my muscles. My arms have filled out and no more loose skin jiggling. I take this product with collagen and my skin has improved also. I will be ordering again, but the amino powder, so that I can put it in my daily smoothy. You should definitely get this product!