L-Glutamine is a conditionally essential amino acid required for many processes, including cell metabolism, immune function, and glutathione synthesis. Particularly when under stress, the body may not make enough glutamine on its own, and glutamine becomes a limiting factor that slows down these processes. During times of illness, recovery from surgery, regularly engaging in intense exercise, or exposure to environmental stressors, supplementing with high-quality glutamine may support immune and gut health, intestinal barrier integrity, retention of lean mass, and endogenous glutathione synthesis.*