Different preferences for oils with similar fatty acid profiles

While preference for fat can be influenced by concentration and physical fo rm, the influence of fatty acid composition on relative preference for oils has not been systematically investigated. Therefore, the purpose of the pr esent investigation was to assess the relative preference for oils rich in oleic (Extra Light(TM) Olive Oil and Extra Virgin Olive Oil) and linoleic ( Safflower Oil) acid, Male Fischer rats (n = 10) were used to determine pref erence in a two-choice testing procedure in which three pairs of oils were each tested twice. Preference testing occurred at dark onset at which time the rodent diet and water were removed and each rat was allowed 2-h access to his assigned pair of oils. There was a main effect of oil type (p < 0.01 ), but no significant effect of oil pairing and no interaction between oil pairing and oil type. Rats preferred the Extra Light Olive Oil to the Extra Virgin Olive Oil (p < 0.05). This is the first report of preference testin g in which two oils with similar fatty acid profiles were included. The pre sent data indicate that the fats with similar fatty acid profiles were not equally preferred, suggesting that a property other than the fatty acid com position of the oils accounts for the demonstrated preference. (C) 2000 Els evier Science Inc. All rights reserved.