Ingredients from animals are used in many products, including soaps, cosmetics, and other personal hygiene products, processed foods, cleaners, candles, waxes, and lubricants. Such ingredients may be derived from mammals, fish, birds, insects, crustaceans, and other animals, including animals used to commercially produce meat, milk, eggs, fur, or wool, from euthanized pets and wildlife, from animals used in racing or rodeos, and from roadkill. While in some cases it is obvious whether products or their ingredients are derived from animals, in other cases it is impossible to tell just by knowing the name of the ingredient. For example, “natural flavor” might come from vegetables or animals, and beta-carotene can be made synthetically or derived from vegetable or animal sources. Often, ingredients are derived from animals for economic reasons.