1. Protein synthesis, as any other of the 20 proteinogenic amino acids
2. Regulation of acid-base balance in the kidney by producing ammonium
3. Cellular energy, as a source, next to glucose
4. Nitrogen donation for many anabolic processes, including the synthesis of purines
5. Carbon donation, as a source, refilling the citric acid cycle
6. Nontoxic transporter of ammonia in the blood circulation
WHAT IS IT?
Glutamine aids in the healing process of the muscles. It's an amino acid very popular with bodybuilding and athletes alike. After workouts your body needs to repair it's self and unless your eating a lot of chicken, eggs, spinach etc. You probably aren't repairing your muscles thus why it's good to supplement it. I've seen studies where bodybuilders would take up to 35 grams of glutimine, but you have to realize how brutal most of their workouts are. So their glutimine levels will deplete more than an average person's workout.