This study provides further evidence that the incorporation of silver, particularly nano-silver, in packaging materials appears to be safe for food packaging. Insignificant levels of nano-silver were released and migration from impregnated containers into real food samples and food simulants has been determined. Conversely, higher levels of migration have been observed for samples exposed to nanosilver coated films, corresponding to 0.03 mgL1, which is cautionary whether in the nanoparticle or ionic form. No chemical or biochemical changes occurred in the tested food samples.
Therefore, more research on the migration of ENPs in contact with food materials is needed in consideration of the potential for extending the shelf life of foodstuffs packaged in nanocomposite materials as well as the safety implications on human health when consume these food packaged in these type of packaging.