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The influence of expeller processed soybean oil on lipid responses in rats
Author(s) -
Shadzi Pey,
Alvarez Elizabeth,
Price Penny,
Ciepiela Magdalena,
Kern Mark
Publication year - 2008
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.22.1_supplement.1092.12
Subject(s) - weanling , soybean oil , food science , cholesterol , leptin , polyphenol , body weight , chemistry , obesity , biology , biochemistry , antioxidant , endocrinology
Oil refinement has been demonstrated to reduce the content of potentially important nutritional components of food oils such as polyphenols. The influence of soybean oil refinement on health‐related properties has not been an active area of investigation. This study was designed to assess the influence of expeller pressed soybean oil (EPSO) versus conventionally refined soybean oil (RSO). Sixteen male weanling Sprague‐Dawley rats were equally divided into two groups. Rats consumed diets consisting of 20% fat by weight from either EPSO or RSO for 30 days. At the end of the study, animals fed EPSO tended to have a lower (p=0.065) body weight with no difference (p>0.05) in epididymal fat weight. EPSO‐fed rats exhibited significantly lower (p<0.05) serum concentrations of triglycerides and non‐HDL‐cholesterol with higher (p<0.05) HDL‐cholesterol. No differences in serum glucose, insulin, or leptin were detected. Results suggest that consuming a diet containing a minimally processed soybean oil promotes an improved blood lipid profile in rats relative to consuming a refined soybean oil. Research is needed to determine the safety of unrefined soybean oil for animals and humans and to determine if similar positive effects occur in humans.