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Journal of Nutrition Vol. 111 No. 8 August 1981, pp. 1437-1445
Copyright © 1981 by American Society for Nutrition
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Effect of Diets High in Carbohydrate, Soy Oil, Medium-Chain Triglycerides or Tripelargonin on Blood and Liver Lipid and Glucose Intermediates in Meal-Eating Rats

David G. Guy and Roland J. Tuley, Jr.

Medical Research Department, Mead Johnson Nutritional Division, Evansville, IN 47721

Medium-chain odd carbon fats have been reported to be ketogenic as have medium-chain triglycerides (MCT). Such an odd carbon fat, tripelargonin, was compared to MCT for its effect on ketogenic and glucogenic intermediates when fed as a part of a complete diet to meal-eating rats. Isonitrogenous diets containing, as 68% of the calories, soy oil (SO), MCT, tripelargonin (C9TG) were fed 2 hours twice a day. After 4 weeks, the C9TG rats during meals had blood and liver ß-hydroxybutyrate levels approximately 300 and 125%, respectively, of the fasting levels and similar to the prandial SO-fed levels. These levels were significantly less than the 1,000 and 500% elevations observed in the MCT-fed rats. Prandial blood glucose and liver glycogen levels were similar in the C9TG and SO-fed rats; whereas, these intermediates appeared to remain at or drop below the fasting levels in the MCT-fed animals. Levels of plasma non-esterified fatty acids and liver glucose-6-phosphate in the MCT and C9TG were similar and different from the SO-fed values. These results point to the uniqueness of C9TG when compared to even-numbered triglycerides under these dietary conditions.

KEY WORDS: • tripelargonin • MCT • ketones • glycogen

Manuscript received 1 March 1981.




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