Glutamine

Glutamine is used to maintain optimal performance, 60% of free-form amino acids floating in skeletal muscles is L-glutamine. L-glutamine plays a very important role in protein metabolism, and it appears to be a very important nutrient for body builders. When supplemented, it may help body builders reduce the amount of muscle deterioration that occurs because other tissues that need glutamine will not rob the glutamine stored in the muscle cells. After intense workouts, glutamine levels in the body can reduce by 50%. Studies show glutamine supplementation can minimize the breakdown of muscle tissue and improve protein metabolism.