I have been taking these for some time now, what a difference,
I am a very active 73 year old, I work out 3 times a week, ride my bike every day and detail my two cars regularly, and play on 3 pool leagues.
I take Advanced Amino everyday and have all the energy I need for a full day. If I forget to take them I run out of energy about 1/2 way through the day. It does everything thing it promises to do and I highly recommend them. I order 3 or more at a time, I do not want to run out.