April 2019: No evidence that portion size influences food consumption in male Sprague Dawley rats

Posted by he28 at May 09, 2019 02:50 PM |
Studies carried out by researchers at the University of Leicester supported by the Division of Biomedical Services led by James McCutcheon's research group.



  • Portion size effect (PSE) refers to increased food intake induced by large portions.
  • Although widely replicated in human feeding studies, it may not exist in animals.
  • Presence of a PSE in animals would shed light on its mechanisms, which are not known.
  • Here, we find no evidence of PSE in male Sprague Dawley rats under a number of experimental conditions.
  • This suggests that the human PSE is more likely due to socio-cognitive processes.


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