Palm oil is one of the most widely employed cooking oils in Nigeria today. This study compares the effects of long term consumption of the two forms of palm oil fresh palm oil (FPO) and thermally oxidized palm oil (TPO) on serum electrolytes, creatinine and urea, which gives vital information on the state of the renal system. Eighteen male New Zealand rabbits weighing 750 1000 g were used for this study. They animals were randomly assigned one of three groups (n = 6) thus; control group, FPO fed group and TPO fed group. The control group received animal feed and clean water only. Fresh palm oil group received animal feed mixed with fresh palm oil in the ratio 85:15g respectively, TPO fed group received animal feed mixed with thermoxidised palm oil in the ratio 85:15g respectively. The feeding lasted for 6 months. Food intake, water intake and body weight were measured daily. At the end of the feeding period, the animals were sacrificed under chloroform anaesthesia and blood was collected for assessment of serum electrolytes, creatinine and urea. Results obtained showed that serum concentration of sodium was significantly (p
Key words: Creatinine, fresh palm oil, serum electrolytes, thermoxidized palm oil, urea
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