Defining the problem. What is your source of medical information? ; Does a gluten-free diet work for you? ; Picky eaters: orthorexia and the hygiene hypothesis ; Pitfalls and perils of a gluten-free diet ; Supplements and probiotics ; A word on testing: what do antibodies tell us? -- What is going on in the gut. The normal gut and digestion ; The gut in disease ; The microbiome ; The "second brain" in the gut -- The fingers on the trigger. Gluten and nongluten grains ; Carbohydrates and FODMAPs ; Drugs ; The double hit theory ; Inflammation ; Intestinal permeability: "leaky gut" -- Putting order in the disorders. Celiac disease ; Gluten sensitivity: the new kid on the block ; Irritable bowel syndrome ; Inflammatory bowel disease ; Eosinophilic esophagitis ; Neuropathy ; Diabetes ; Wheat and other food allergies ; Fibromyalgia and chronic fatigue syndrome -- The brain-gut-gluten connection. Autism spectrum disorders and ADHD ; Schizophrenia: revisiting "bread madness" ; Brain fog: neurology or meteorology? ; The stress of holding back -- Navigating a gluten-free life. Nondietary therapies: the drug pipeline ; Eating healthy ; Myths and misconceptions ; Food for thought -- Appendix A: diets through the ages -- Appendix B: resources -- Appendix C: arsenic and mercury guidelines -- Appendix D: guidelines for eating gluten-free -- Appendix E: scientific articles and studies.