Foods to avoid with a leaky gut include wheat-based products (bread, pasta, cereals, wheat flour, couscous, etc.), gluten-containing grains (barley, rye, bulgur, and oats), processed meats (cold cuts, deli meats, bacon, hot dogs), baked goods (cakes, muffins, cookies pies, pastries, and pizza), snack foods, junk food, dairy products, refined oils, artificial sweeteners, sauces, alcohol, carbonated beverages, and soda.