100 percent micronized Japanese Fermapure TM. By Ultimate Nutrition. Contains no artificial color, flavor, yeast, starch, wax or preservatives. L glutamine is an amino acid that is considered conditionally essential when starting up a physical exercise program. It helps to reduce the lactic acid build up and soreness. As well it is used to help rebuild the gut lining of the stomach for individuals who have leaky gut syndrome. It is prescribed pre and post surgery for faster recovery. These are a few on the benefits of L Glutamine on muscle and joint health.