I am only two months into this, so please be patient. I do not know about L-Glutamine. I just purchased GlutenEase and Digest Gold. Both are manufactured by Enzymedica. GlutenEase states: "...the addition of Amylase and Glucomylase will assist in the digestion of the non-protein portion of the cereal grains which often contain gluten...contains a blend of protease, lipase, amylase and cellulase..." Anyone familiar with this concept?