Food toxicology is the study of harmful effects of chemicals in food on living organisms. It includes terms like toxicology, xenobiotic, toxicokinetics, toxicodynamics, poison, and toxicant. Toxicants are poisons produced by various sources, including plants (phytotoxins), fungi (mycotoxins), animals (zootoxins), and bacteria (bacteriotoxins). Understanding these terms is fundamental in assessing food safety.