TrueBUILD contains the amino acid L-glutamine, one of the most abundant building blocks in the body. Glutamine is excellent for healing the digestive tract, particularly in the case of ulcers, inflammatory bowel disease or diarrhea. It is used as a source of fuel for the cells that line the intestinal tract; without it, these cells waste away. Glutamine also aids in the production of proteins, which are important for building muscle, it boosts growth hormone levels important for muscle growth and repair and it prevents the breakdown of muscle fibers. Glutamine is also an excellent amino acid supplement for recovery after exercise and for the symptoms of overtraining.