Vegetarian diets: many vegetarians have different lifestyles as a whole, maintain healthy weight, use no tobacco or drugs, use less alcohol, more active, lower rates or diseases, obesity, diabetes, hypertension. Types: semi-vegetarian, eat seafood, poultry, eggs, dairy, legumes, fruits, nuts. Excludes red meats: lacto-ovo vegetarians, eat plants, dairy and eggs. Excludes meat, poultry, fish, seafood: lacto vegetarians, eat plant products and dairy products, vegans, no animal products. Iron: zinc, calcium, omega-3 fatty acids, walnuts, flax seed. Gluten related diseases: celiac disease, autoimmune disorder that can occur in genetically predisposed people where the ingestion of gluten leads to damage in the small intestine, 1 in 100 people world wide, testing. Must not be following a gluten-free diet prior to. Lifelong adherence to a gluten-free diet: wheat allergy, non-celiac gluten sensitivity, reaction to gluten without meeting the criteria for celiac disease, symptoms: abdominal pain, bloating, diarrhea, or constipation. Fodmap diet (fermentable, oligosaccharides, disaccharides, monosaccharides and polyols: eliminate foods containing fodmaps.