I usually don't mind elaborating but the evidence against glutamine's [purported] effects on bodybuilding is so overwhelming that I encourage you to conduct your own quick research
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I'll point you in the right direction though:
-Effect of glutamine supplementation combined with resistance training in young adults.
-Glutamine: the nonessential amino acid for performance enhancement.
-Addition of glutamine to essential amino acids and carbohydrate does not enhance anabolism in young human males following exercise.
-The effects of high-dose glutamine ingestion on weightlifting performance.
-Facts and fallacies of purported ergogenic amino acid supplements
-Exercise-induced immunodepression- plasma glutamine is not the link.
-Glutamine supplementation did not benefit athletes during short-term weight reduction
^^All titles of peer-reviewed, methodologically sound/relevant studies for your viewing pleasure.