IgA is the most abundant antibody produced by the body & is in the blood and surface of all mucous membranes which includes the GI tract. LOW IgA has shown increased infections of ears, lungs, GI tract, anemia. It has been associated with celiac and UC. Celiac and food allergies, malabsorption have been tied to GERD too. Has anyone had low IgA on their labs and received successful treatment relieving reflux. Thanks for your thoughts.