The simple answer is not all that simple. Creatine can give you some help in this area, but remember, most scientists agree that for creatine to work effectively it needs to be taken with a simple sugar, such as that found in grape juice, for example.
Now, I am only speculating based on what I know and have experimented with, but I would think that if you combined glutamine with one of the newer Creatine-esthers which reportedly work better at lower doses and without glucose dependencies, then you might get some benefit. I'll do some digging and see what I can find for you.
Good to see you again Zze!
Arttie
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