I've been taking Advanced Amino (was called Perfect Amino when I started) for years with amazing results. I've been lifting weights faithfully since 1978. As I entered into my mid 50's I was losing muscle mass, couldn't get a pump when I lifted, and developed muscle pain, especially in my legs. Starting to move after being still for an extended time (mainly getting up in the morning) was slow and uncomfortable. I saw the infomercial and gave this stuff a shot. In a short time I filled back out, my workouts improved, and most importantly the pain went away. Of course I would feel great and think I can cut back on the dosage to save money - even skip some days. Without paying attention, the symptoms would slowly creep back. I would sometimes get to the point of walking with a limp then the light would go off. Crap, I need to go back to full dose. Within 3 days I'm back to feeling good. Not only do I rely on Advanced Amino's to look and feel my best at age 60, the companies customer service is fantastic. My last shipment got messed up.
I called and it was resolved immediately. No hoops to jump through. 3 days later, product was at the door.
So if your in your 50's and have similar issue's (especially if you're an ex-bodybuilder), you have to give this a shot. It won't take long before you see and feel the difference. These guys really know their stuff. And they run a good business.