Similarly, Sun et al. (2009), who fed a corn–soybean meal diet with whey and fishmeal, found that hepatic Zn increased from 48 to 55 mg/kg when dietary Zn was supplemented at 0 and 60 mg/kg, but it decreased to 51 mg/kg when 120 mg Zn/kg was added as Zn sulfate in a 28-d study.