The Cantons of Switzerland perform tests to assess the presence of genetically modified organisms in foodstuffs. In 2008, 3% of the tested samples contained detectable amounts of GMOs. In 2012, 12% of the samples analysed contained detectable amounts of GMOs (including 2.4% of GMOs forbidden in Switzerland). Except one, all the samples tested contained less than 0.9% of GMOs; which is the threshold that impose labelling indicating the presence of GMOs.