Fatty, Hard-to-Digest Foods Prime rib Fried meats or vegetables French fries Cheese Citrus Fruits Oranges Pomelos Tangerines Mandarin oranges Grapefruit Lemons Limes Tomatoes (and tomato-based sauces) Vegetables Onions Shallots Garlic Spicy peppers (jalapeños, habaneros, poblano, serrano, pepperoncini, banana peppers) Sweets Chocolate Ice cream Spices Mint Cayenne pepper Red chili flakes Chili powder Drinks Caffeinated beverages (coffee, black teas, energy drinks) Carbonated beverages (club soda, diet sodas, sparkling water) Cow’s milk Alcohol Orange juice Lemonade Grapefruit juice