The mucosal membranes that cover our skin, sinuses, airways, digestive tracts and many other regions are critical to our health. Not only do they help protect our bodies from intruders and environmental toxins. They also provide many other critical functions, such as helping us digest our foods and helping us breathe. As a result, faulty or damaged mucosal membranes is also at the root of many serious health conditions, including allergies, asthma, COPD, GERD and others. This book illustrates the science behind our mucosal membranes: how they cause disease, how they can become damaged, and what we can do to repair them and keep them healthy.