Even though an aluminum foil can be used in an electric tandoor, it is advisable to not use it this way. When food, that's wrapped in aluminum foil, is heated, it results in the migration of aluminum into food. The amount that's transferred is above the permissible limit set by the WHO. This is especially true for acidic, spicy and liquid foods. The acidity reacts with aluminum and allows the metal to seep into the food.