Shown to Help with Gut Healthand Bloat Can Assist in Metabolism lmmunte Function L-Glutamine is an amino acid that is produced by the body. It is considered a conditionally essential amino acid, which means that the body can synthesize it as needed, but in some cases, such as during times of stress, the body may not be able to produce enough. L-Glutamine plays a key role in many biochemical processes.