For centuries, bread has been known as the "staff of life." But for millions of Americans affected by gluten-related disorders, consuming gluten, the complex protein found in wheat, rye, and barley, can be hazardous to their health. In a recent poll presented by Scientific American, over 30% of Americans reported wanting to cut down or eliminate gluten from their diets; the gluten-free market is a $6.3 billion industry and continues to expand.