Glutamine

Glutamine is an amino acid that is found naturally in the body and is involved in several important functions. It is a building block of proteins and plays a role in the immune system, gut health, and muscle repair. Some people take glutamine supplements, either as powders or capsules, in the belief that they can improve exercise performance and help with muscle building.

There is some evidence to suggest that glutamine supplements may help with muscle recovery after intense exercise and may also improve immune function in people who are physically stressed, such as athletes or people with serious illnesses.