Vapers have a vast selection of tastes to choose from, including m enthol, cherry, coffee and bubble gum, but they said that although the flavourings used are mostly the same as those found in food and have therefore passed safety tests, this applies to them being eaten rather than inhaled. The study carried out in the United States analysed the chemicals used to flavour e-cigarette fluid in a sample of 30 products, and found a “significant” number were aldehydes – compounds which are recognised to be primary respiratory irritants.