Overview
- On Thursday, July 30, 2026, regional outlets republished a social-media warning from neurologist Dr Baibing Chen that severely damaged tinned or canned foods are a red flag for botulinum contamination.
- Botulinum toxin, produced by Clostridium botulinum, blocks nerve signals and can cause blurred vision, descending flaccid paralysis, respiratory failure and death without prompt antitoxin and respiratory support.
- The toxin is tasteless and odourless and may not be destroyed by reheating, so contamination can be undetectable before symptoms appear.
- The Food Standards Agency says the overall risk from commercially purchased UK foods is low but endorses throwing away any bulging, heavily rusted or deeply dented tins, including supermarket-bought items.
- Most foodborne botulism results from improper canning or preservation, so safe home-canning practices, correct storage and cautious disposal of suspect cans remain the main ways to prevent illness.