Objective:To observe the influence of soybean isoflavone(SI) on the fat level and lipid peroxides in rats.Methods:Fifty wistar rats were randomly divided into five groups and fed on foundation feed high fat feed,and high fat feed mixed with 30 mg/kg,90 mg/kg and 270 mg/kg soybean isoflavone respectively.The experiment lasted for 6 weeks.Results:SI could obviously inhibit the rise of low density lipoprotein(LDL) induced by high fat feed in the plasma( P <0.01).SI had preventive effect on the rise of lipid...