VARIOUS HIGH MONOUNSATURATED EDIBLE OILS MIGHT AFFECT PLASMA-LIPIDS DIFFERENTLY IN MAN

This study investigated the effects of three high monounsaturated edib le oils with different fatty acid compositions on plasma lipid metabol ism in man. Ten healthy young men were engaged for this study, and rec eived four various experimental meals respectively prepared with diffe rent cooking oils, i.e. olive oil, liquid lard, rice bran oil or soybe an oil (control). These oils supplied 32.7% of the daily total calorie s for a period of 18 days, and had normal diet at each interval of two experimental diets for at least 18 days in order to return to the pre vious normal physiological condition. Results showed that the reducing effects of the rice bran oil and soybean oil diets on percent changes of the plasma total lipids, total cholesterol and LDL-C were signific antly larger (P<0.05) than the ones of the olive oil diet. The data al so demonstrated that ingestion of soybean oil might have lower HDL-C t han of olive oil. The results indicated that the saturation, P/S and P +M/S ratio of various edible oils had no consistency with the response s of plasma lipids. Therefore, it might suggest that effects of certai n fatty acids in an edible oil may be stronger than its saturation on lipid metabolism.