The current results show that the rearing system can influence the composition of eggs in macro and trace elements. Inadequacy in the concentrations of macro and trace elements (P and Zn) in eggs from hens kept in the organic husbandry system may have consequences for both poultry and human nutrition. Our study contributes to the resolution of this debate since it reveals considerable differences in the corresponding element concentrations between the eggs originating from the conventional and organic systems. Further research is needed to reveal the dietary influences of source and level of supplemental minerals, availability of pasture throughout range area and free access to soil. Such scientific studies could also provide proof for claims that organic eggs may be more nutritious than conventional eggs.