Product Description L-Glutamine, the free amino acid, is the single most abundant amino acid present in skeletal muscle. L-Glutamine may support muscle tissue by limiting the degradation of protein through nitrogen retention, glycogen synthesis, and protein synthesis. L- Glutamine may also assist in the fueling and detoxifying of the brain. Thus, L-Glutamine has been dubbed Â?the thinkerÂ?s aminoÂ?. L-GlutamineÂ?s muscle and brain tissue supporting qualities have made L-Glutamine an invaluable addition to an athleteÂ?s regimen.