Relatively high levels of TFAs were observed: elaidic acid isomers (C18:1t) were the primary TFA, which is found in hydrogenated vegetable fat (Wagner et al., 2008). Thus, it is possible that this type of fat is often added to snack dough. A study that analysed the TFA content of a selection of foods sold in Switzerland, such as croissants and hamburgers, reported that elaidic acid was the TFA detected at the highest levels (Richter, Shawish, Scheeder, & Colombani, 2009).