Pro Nutrition Kyowa G3300 is a dietary supplement that contains glutamine, a semi-essential amino acid that can be produced by the body. This important substance contributes to the strengthening of the immune system, as well as the health of the brain and digestive system. It is also used to provide "fuel" to cells, while it helps in the production of glucose and other amino acids, which are fundamental components of proteins. With 90 capsules per package, it is ideal for daily use.