Did you know that up to 70% of your immune system resides in your gut? The mucosal layer, only a single cell in thickness, serves as the first line of defense in your immune system. This layer, often referred to as GALT (gut-associated lymphatic tissue), is found in both the gut and the lungs. GALT contains the antibody, Immunoglobulin A (IgA). It is the secretion of IgA that alerts the body of invasions by unwanted antigens and microbes. Stress, excessively low or high cortisol levels, infection, poor diet and food sensitivities can strip IgA from the gut and lungs, rendering them extremely vulnerable. It makes sense to maintain and protect your gut's mucosa!