I use AST. As for it "working"....glutamine isn't the sort of supplement most people see dramatic results from. (you won't gain size or strength like some people do with creatine)
You may notice you need less time to recover from hard workouts. I've found that I still get sore but it doesn't last nearly as long. I've also found that I'm healthier overall since I started taking it. It helps with digestion as well.
I think it's a really good supplement. i'll post some more info for you when i find it!











