title: Binge-type behavior in rats consuming trans-fat-free shortening.
abstract: Studies from this and another laboratory involving an animal model of binge-type behavior have used vegetable shortening containing trans-fats. Due to reformulations by vegetable shortening manufacturers to remove trans-fats from their products, only trans-fat-free shortenings are now available. The goal of the present study was to assess binge-type behavior in rats with trans-fat and trans-free vegetable shortening. Trans-fat-free shortening was provided to three different groups of non-food-deprived male Sprague Dawley rats on different schedules of access: continuous access (24 h/day-7 days/week), daily access (1 h every day), and intermittent access (1 h on Mondays, Wednesdays, Fridays). Trans-fat shortening was provided to a fourth group on the intermittent access schedule. A fifth group had no shortening access (chow only). Both intermittent groups (trans-fat-free and trans-fat) consumed significantly more shortening during the 1-h period of availability than did the daily group, and there was no difference in shortening intakes between the intermittent groups. These results are identical to previous reports of binge-type behavior in rats using this model. Thus, binge-type behavior in the present behavioral model depends upon the schedule of access, not the presence of trans-fats in the shortening.
authors.affiliation: The Pennsylvania State University, College of Health and Human Development, Nutritional Sciences Department, 126 S. Henderson, University Park, PA 16802, USA.
authors.forename: F H E
authors.initials: FH
authors.lastname: Wojnicki
authors.forename: G
authors.initials: G
authors.lastname: Charny
authors.forename: R L W
authors.initials: RL
authors.lastname: Corwin
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D002032:Bulimia / Q000503:physiopathology* / Q000523:psychology; D004041:Dietary Fats / Q000008:administration & dosage / Q000145:classification; D002149:Energy Intake / Q000502:physiology*; D005223:Fats / Q000737:chemistry; D005247:Feeding Behavior / Q000502:physiology* / Q000523:psychology; D005518:Food Preferences; D008297:Male; D051381:Rats; D013649:Taste / Q000502:physiology; D044242:Trans Fatty Acids / Q000008:administration & dosage*
chemical_list: D004041:Dietary Fats; D005223:Fats; D044242:Trans Fatty Acids