Glutamine is the most abundant amino acid in human blood. It can become conditionally essential in certain situations, such as during intense physical exercise when the body may not be able to meet its needs. This conditionally essential amino acid can be provided by dietary protein intake and through supplements.

Glutamine promotes a healthy digestive system by contributing to the balance of acid/alkaline levels in the body. It is directly absorbed by the cells of the small intestine and may be beneficial for individuals with digestive issues. Some experts believe that glutamine supplements can benefit individuals with intestinal problems.