doi:10.5402/2011/541694 Research Article Differences in Pop Levels between Conventional and Omega-3 Fatty Acid-Enriched Milk and Dairy Products


Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Conventional and omega-3 fatty acid-enriched milk and cheese were analyzed for persistent organic pollutants (POPs). Omega-3-enriched products are usually supplemented with fish oil which is potentially contaminated. All classes of the considered POPs (PCBs, DDT, HCB, PBDEs, and PCDD/Fs) were found in the samples, with average concentrations higher in omega-3-enriched products than in conventional ones. For PCBs, DDT, and HCB, differences were statistically significant and, therefore, cannot be ascribed to normal variability. With regard to all classes of compounds, the highest levels in individual samples were always found in omega-3 products, in line with the hypothesis that these foods are potentially more contaminated than conventional ones. 1

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