Our results of soy-containing products were similar to the results of Cardarelli et al. (2005), who found that 20% of their samples were positive for RUR soy. Similarly, the results of Taski-Ajdukovic et al. (2009) proved that 12 of the 50 (24%) processed meat products they screened contained GM soy. The results of Ujhelyi et al. (2008) showed that 38% of the soy-containing foods they tested were GM positive, while 6% of them were above the threshold level introduced in EU legislation. However, another study performed in Poland showed that 44 of 45 (92.6%) soy-containing feed and feedsupplement samples were genetically modified, although most of them were below the threshold level (Sieradzki et al., 2006).