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Nigerian Journal of Nutritional Sciences

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Effect of Coconut (cocus Nucifera) and Palm Kernel (eleasis Guinensis) Oil Supplmented Diets on Serum Lipid Profile of Albino Wistar Rats

EH Itam, EU Eyong, AE Eno, IJ Atangwlo

Abstract


Objective: This study investigated the effect of coconut and palm kernel oil supplemented diets on the lipid profile of Wistar albino rats.
Materials and Methods: Three different groups of seven rats each were respectively fed three different diets for a period of 90 days. Group A animals were fed with rat pellet supplemented with 10% coconut oil, while Group B animals were fed rat pellet supplemented with 10% palm kernel oil. Group C animals which served as the control were fed normal rat pellet. At the end of the feeding period, animals were anaesthetized under chloroform vapor, dissected and blood obtained via cardiac puncture into tubes. Serum was separated and used for assay of lipid profile using standard kit methods. The results obtained were analyzed statistically using the analysis of variance (ANOVA).
Results: Serum total cholesterol level of palm kernel oil fed group (115.75±13.71mg/dl) and the coconut oil fed group (94.35±4.32mg/dl) were significantly higher (P<0.05) when compared to the control group (64.45±3.63mg/dl). The serum triacylglycerol level in the palm kernel oil fed group (151.68±18.1mg/dl) and coconut oil fed group (135.43±9.88mg/dl) were higher than that recorded by the control group (126.71±11.09mg/dl). The low density lipoprotein- cholesterol (LDL-C) level of palm kernel oil fed group (63.39±4.8mg/dl) and coconut oil fed group (42.63±2.38mg/dl) were higher than values observed for the control group (28.79±4.18mg/dl). However, the high LDL-C was only significantly higher (P<0.05) in the palm kernel oil fed group. The high density lipoprotein- cholesterol (HDL-C) level in all the experimental groups were relatively the same (18.87±0.32mg/dl for the palm kernel oil fed group 18.87±0.77mg/dl for the coconut oil fed group and 18.00±1.32mg/dl in the control group).
Conclusion: The increase in serum total cholesterol, triacylglycerol and LDL-C levels of both groups fed
on coconut oil and palm kernel oil may be possibly attributed to saturated content of the fatty acids in these oils with palm kernel oil possessing a greater atherogenic risk than coconut oil.

Keywords: Coconut oil, palm kernel oil, Lipid profile, Rats.



http://dx.doi.org/10.4314/njns.v31i1.63896
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