L-glutamine - an amino acid that is the main “builder” of proteins, supports the processes of muscle formation, and that is why it is popular among people who want to increase muscle mass. Our body needs to supplement its glutamine deficiency in food, as its is used for many life processes. Glutamine is helpful in treating leaking gut and improving general health. It is therefore a great anti-catabolic that also supports the work of the digestive system.