BBQ avoid BBQ, charred meats, charred vegetables. These are carcinogenic to humans. The sauce is tomato based which is high in oxalates. Heterocyclic amines (HCAs) and polycyclic aromatic hydrocarbons (PAHs) are chemicals formed when muscle meat, including beef, pork, fish, or poultry, is cooked using high-temperature methods, such as pan frying or grilling directly over an open flame. These are known carcinogens.