Int. J. Environ. Res. Public Health 2009, 6 3.5. Statistical Analysis 3136 Differences in the mean levels of toxic elements contamination across the three groups of positive samples was determined by analysis of variance and then by a Student’s t-test. Additional posttests were applied to evaluate differences among groups with statistically significant variation among means. Differences with p values smaller than 0.05 were considered statistically significant. 4. Conclusions It could be concluded that the presence of toxic elements in swine kidneys and consequently, the human exposure to relevant Provisional Maximum Tolerable Daily Intakes (PMTDIs), Provisional Tolerate Weekly Intakes (PTWIs) and Tolerable Daily Intake (TDIs) of the four toxic elements under study are below that those reported by the FAO/WHO, who have set a limit for toxic element intake based on body weight for an average adult (60 kg body weight) [24,25,81]. Thus, the consumption of average amounts of pork meat and meat byproducts which include internal organs (liver, kidneys, heart, and lungs) does not pose a health risk for the consumer. The present study provides data on the prevalence of toxic elements in pigs intended for food which were raised in different regions of Serbia and also provides an assessment on the consumer’s exposure to the toxic elements. Despite the limited number of samples examined in the present study, it is important to notice that even the low levels of toxic elements concentration found in food, may contribute to the toxic elements daily intake. The findings of this study suggests that regular surveys for toxic elements should be done on all food commodities in order to evaluate the possibility of health risks associated with toxic elements exposure, to assure food safety and to protect the consumers from food that might negatively affect their health. Regular surveys and monitoring programmes for toxic elements contents in foodstuffs have been performed for decades by several countries. In addition to toxicological assessment it is clearly evident from the studies of many authors and the findings of this study that interactions between toxic elements are very important in toxicology. The kidneys are target organ for As, Cd, Hg toxicity. Long-term, even low-level, exposure to this metal leads to kidney damage characterized by tubular dysfunction. Future research should focus on the interactions between these elements in humans exposed to toxic elements occupationally and environmentally. Acknowledgements This work was supported by the Institute of Meat Hygiene and Technology, Belgrade, Serbia. The authors thank the Institute for the financial support.