Effects of eating rate on satiety: A role for episodic memory?

Dani Ferriday, Matthew Bosworth, Samantha Lai, Nicolas Godinot, Nathalie Martin, Ashley Martin, Peter Rogers, Jeff Brunstrom

Research output: Contribution to journalArticle (Academic Journal)peer-review

19 Citations (Scopus)
383 Downloads (Pure)

Abstract

Eating slowly is associated with a lower body mass index. However, the underlying mechanism is poorly understood. Here, our objective was to determine whether eating a meal at a slow rate improves episodic memory for the meal and promotes satiety. Participants (N = 40) consumed a 400 ml portion of tomato soup at either a fast (1.97 ml/s) or a slow (0.50 ml/s) rate. Appetite ratings were elicited at baseline and at the end of the meal (satiation). Satiety was assessed using; i) an ad libitum biscuit ‘taste test’ (3 h after the meal) and ii) appetite ratings (collected 2 h after the meal and after the ad libitum snack). Finally, to evaluate episodic memory for the meal, participants self-served the volume of soup that they believed they had consumed earlier (portion size memory) and completed a rating of memory ‘vividness’. Participants who consumed the soup slowly reported a greater increase in fullness, both at the end of the meal and during the inter-meal interval. However, we found little effect of eating rate on subsequent ad libitum snack intake. Importantly, after 3 h, participants who ate the soup slowly remembered eating a larger portion. These findings show that eating slowly promotes self-reported satiation and satiety. For the first time, they also suggest that eating rate influences portion size memory. However, eating slowly did not affect ratings of memory vividness and we found little evidence for a relationship between episodic memory and satiety. Therefore, we are unable to conclude that episodic memory mediates effects of eating rate on satiety.
Original languageEnglish
Pages (from-to)389-396
Number of pages8
JournalPhysiology and Behavior
Volume152 Part B
Early online date16 Jul 2015
DOIs
Publication statusPublished - 1 Dec 2015

Bibliographical note

Date of Acceptance: 28/06/2015

Structured keywords

  • CRICBristol
  • Brain and Behaviour
  • Nutrition and Behaviour

Keywords

  • Eating rate
  • Oral processing behaviours
  • Satiation
  • Satiety
  • Episodic memory
  • Memory for recent eating

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