At 63 and in mint health, I have noticed difficulty in maintaining/growing muscle mass even though I train diligently and maintain a clean, nutritious diet. Because of the high AAU value of this product and convenience of taking it consistently, I decided to give this supplement a try. After a month along with some other minor changes in my diet, I have experienced increased muscle mass, especially in my arms, and no longer deal with lingering sore muscles or aches and pains. If you are a senior serious about staying strong and healthy, I recommend putting Advanced Amino to the test.