Asked by: Fergus Collins, by email
With its sugar, carbonic and phosphoric acids, cola would seem well able to dissolve teeth. But so can many acidic drinks, including orange juice: there’s nothing especially nasty about cola. The idea that it can destroy teeth literally overnight appears to be an urban myth with its origins in misquoted statements made by a Cornell University professor in 1950.
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.