This study investigated the the effect of potassium bromate on the Packed CellVolume (PCV) ofwistar albino rats. Thirty (30) adultmaleWistar albino rats weighing 155-213g used for the study were first acclimatized for one week and divided into 3 groups of 10 rats each; groupA(control), group B, and group C(treatment groups). GroupsB and Cwere fed with compounded feed rations composed of 20%growerÂs marsh and 80% wheat flour treated with 200mg and 300mg of potassium bromate/kg feed ration respectively. Group A (control) animals were fed with the same ration of compounded diet, butwithout potassiumbromate. The animalswere fed for 4 weeks. The result of the study showed that there was no significant difference (p>0.05) between the treated groups and control for PCV.