Natural toxins are chemicals that are naturally produced by living organisms. They can be found in certain plants, animals, and fungi and can pose health risks if consumed in significant amounts. For example, cyanogenic glycosides in cassava and apricot seeds can release cyanide, a potent toxin. Mycotoxins, produced by fungi, can contaminate crops such as grains and nuts. Proper food preparation and processing can help reduce the levels of these natural toxins.