Sugar, Perceived Healthfulness, and Satiety: When Does a Sugary Preload Lead People to Eat More?

Appetite. 2017 Jul 1;114:338-349. doi: 10.1016/j.appet.2017.04.001. Epub 2017 Apr 4.


In this research, we examine the interplay between physiological and psychological factors that determine whether the sugar level of a preload increases or decreases consumption on a subsequent snack-eating task. In study 1, participants who drank a high-sugar protein shake (which they believed to be healthy) consumed more subsequent snacks than participants who drank a low-sugar protein shake. Study 2 replicated these findings, but only when the shake was labeled as "healthy." When the shake was labeled as "indulgent," the effect was mitigated.

Keywords: Compensation; Labeling; Preload; Satiety; Sugar.

Publication types

  • Comparative Study
  • Randomized Controlled Trial

MeSH terms

  • Adolescent
  • Adult
  • Appetite Regulation*
  • Beverages / adverse effects*
  • Delay Discounting
  • Diet, Healthy / psychology
  • Dietary Fats / adverse effects
  • Dietary Sugars / adverse effects*
  • Energy Intake
  • Fast Foods / adverse effects
  • Female
  • Health Knowledge, Attitudes, Practice*
  • Humans
  • Hyperphagia / etiology*
  • Hyperphagia / prevention & control
  • Hyperphagia / psychology
  • Male
  • Models, Psychological*
  • Patient Compliance / psychology
  • Satiety Response*
  • Snacks / psychology
  • Young Adult


  • Dietary Fats
  • Dietary Sugars