Glutamine is one of 22 amino acids which are components of human protein. It promotes anti-catabolic processes and supports the anabolic ones (due to maintaining a positive nitrogen balance). It comes in few different chemical forms, which differ only by speed of digestibility. Because of its wide biological activity, glutamine is extremely popular between professional athletes all over the world. It supports proper functions of your digestive and immune system, which has a huge importance when you train intensively as those workouts may lower the immunity of your body.