L-glutamine supports the development of enterocytes, a type of cell that is plentiful in the epithelial lining of the gastrointestinal tract.* L-glutamine also supports muscle glycogen stores and can cross the blood-brain barrier where the brain uses it for fuel.* Since 1979, NutriCology has used only the purest raw materials available, and has implemented strict quality control procedures in every stage of production, including inspection of raw materials, manufacturing, packaging, and storing. NutriCology fully discloses all ingredients, both active and inactive, on every product label, so consumers can make fully informed choices for their nutritional support. We define hypoallergenic as free of all common allergens, specifically, wheat, corn, soy, gluten, yeast, dairy, eggs, fish, crustacean shellfish, tree nuts, and peanuts. Many very sensitive individuals who react to supplements in general are able to tolerate NutriCology products. Originating with the ground-breaking oxidant/antioxidant work of Stephen Levine, Ph.D., we were one of the first to introduce truly hypoallergenic products to the market.