Natural Factors L-Glutamine enhances muscle recovery, energy, and immunity. As a free-form amino acid, it is more effective than the form obtained directly from food. Supplementing with L-glutamine helps restore levels lost during strenuous exercise and speed up recovery. It also improves digestive health and supports normal brain function. Medicinal Ingredients Non-Medicinal Ingredients Vegetarian capsule (carbohydrate gum [cellulose], purified water), rice powder, vegetable grade magnesium stearate (lubricant). L-glutamine is an amino acid that can be found throughout the body, primarily in the brain, gastrointestinal tract, muscles, and liver cells. During strenuous exercise, L-glutamine levels in the muscle and blood are greatly depleted. Supplementing with L-glutamine can help restore plasma L-glutamine levels depleted after periods of physical stress and can accelerate recovery time. Additional benefits include increased immunity and energy, as well as enhanced digestive and brain function. Micronization technology greatly minimizes the particle size, thus allowing your body to more easily break down and absorb the glutamine.