L-Glutamine (351 grams)

Glutamine, the most abundant amino acid in the body, helps form other amino acids, glucose, protein, and glutathione. Glutamine is stored in the muscles and is the primary metabolic fuel for the cells of the small intestine, fibroblasts, and the immune system.* Supplementation with glutamine can help support gut cell proliferation and mucosal integrity, resulting in decreased intestinal permeability and healthy immune function.*