One hundred random samples of market and bulk raw milk (50 of each)and 50 concentrated (25 each of condensed and evaporated) milk, collected fromdifferent localities in Damietta Governorate.Ninety male albino rats (200-225 gm) were used in this study. The animals were produced from Central Animal House of Faculty of Veterinary Medicine, Zagazig University. They were housed in stainless steel cages in the biochemistry department under hygieni