I have been using Advanced Amino Tabs for about a year now, I feel that even at age 64 I am able to build and maintain good muscle mass with proper diet, rest and resistance exercise. The ease of use, digestion and assimilation and the efficacy of the product make it a cut above the rest of the countless other competitors. I am a licensed physical therapist and I see first hand what long term protein deficiency leads to in older adults. I feel that use of your product, proper diet, exercise and rest will enable people to enjoy a healthier lifestyle for more years.