The present study aimed to assess the levels of some heavy metals (Cu, Fe, Pb, Zn and Cd) in muscles of wild and farmed Oreochromis niloticus as well as to evaluate the human hazard index associated with fish consumption.In addition, total protein, molecular weights and band counts of sarcoplasmic proteins were investigated with sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) ...