Tin levels in canned foods are lower than five years ago and are well within regulatory limits, according to a survey of 400 different samples between December 2000 and August 2001 by the UK food watchdog, the Food Standards Agency (FSA). Of the canned fruit and vegetables and tomato-based products tested, 99.5% contained tin concentrations below 200mg/kg. This is the maximum legal amount of tin that can be present in canned foods as some sensitive people can experience stomach upsets such as nausea, vomiting, diarrhoea, abdominal cramps and bloating if they consume any more.