I like the Xtend. I guess there are probably glutamine products on the market that are cheaper but if you are buying the 1000g size there are not many. As for results, I never look for drastic results when using a product like this and although there are benefits I believe they are subtle. I am always leery of someone making claims about a product doing magical things for them and this has been one in which I have seen people make some pretty absurd claims. So it's hard to answer your question when it comes to this. We all know that glutamine aids in protein synthesis, anti-catabolism and cell volumizing but again I think the effects are going to be very subtle. Glutamine can also help you produce higher growth hormone levels but I think anyone using glutamine and claiming they have really noticed a huge difference in either their workouts or appearance are kidding themselves. One thing I do like about Xtend is there is zero carbs and zero sugar.

I would caution you though. I have tried the other flavors and found them to be pretty nasty. That's why I stick with the watermelon.