Food poisoning is when food becomes unsafe because toxins, viruses, or bacteria have contaminated it. Such food causes food-borne illnesses.
Australia’s Healthdirect.gov.au notes that certain toxins are found naturally in the food while other contaminants are introduced during the transportation, production, cooking, and storage phases.
Food contamination often results from bad handling and insufficient cooking.
On the other hand, certain foods are naturally poisonous. The publisher of health information, WebMD.com, lists some foods that can be naturally toxic, including two types of deadly mushrooms, the death cap (Amanita phalloides) and the destroying angel (Amanita virosa).