Glutamine is the most abundant Amino Acid within muscle tissue, however when you train, Glutamine levels can be significantly reduced as muscle tissue breaks down – even more so with the bodybuilding style of training. Micronized Glutamine is the most abundant Amino Acid within muscle tissue, however, when you train, Glutamine levels can be significantly reduced as muscle tissue breaks down – even more so with the bodybuilding style of training. Supplementing with Glutamine (in particular post-workout) can allow you to restore the depleted Glutamine levels.