Abstract
In the previous papers, the authors reported that tocopherol showed the effect to reduce the toxicity of thermally oxidized oil (TO) in rats.The present paper deals with the comparison of nutritive values among TO with or without tocopherol (Toc) and fresh oil without tocopherol.Soybean oil was heated at 180°C for 50 hours, and TO with or without Toc and/or fresh oil (FO) from which Toc was removed by active alumina column chromatography were fed to rats in a diet contained 15% of test oils.The results indicated that the rats fed with TO showed growth depression as reported in the previous papers. On the other hand better growth was observed when the rats were fed with the Toc free FO.The weight and lipid content in liver and kidney of rats fed with TO were higher than those of rats fed FO or Toc free FO.On the contrary, the decrease of weight, lipid and Toc content in testicle of rats fed with TO or Toc free FO was observed.Feeding of TO and Toc free FO reduced the percentage of C18 : 2 in liver, kidney, testicle and blood lipids, but they were increased by the addition of Toc in the diets.Hemolysis rates of erythrocyte of rats fed with TO was higher than those of rats fed with free FO or the TO with Toc.
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