Physiology & behavior · 2026
Changes in food reward are associated with improvements in metabolic markers and eating behaviors after bariatric surgery.
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Lachance Amélie, Toro Victoria, Legault Marianne, Gagnon Patrick, Pelletier Mélissa, Biertho Laurent, Provencher Véronique, Iceta Sylvain, Tchernof André, Picard Frédéric, Michaud Andréanne
Аннотация
BACKGROUND: Bariatric surgery improves metabolic health and eating behaviors. However, its impact on food reward, particularly liking and wanting, remains poorly understood.
OBJECTIVE: To characterize changes in explicit and implicit food reward following sleeve gastrectomy and to examine their associations with metabolic health and eating behaviors.
METHODS: Food reward was assessed before and 4 months after surgery using the Leeds Food Preference Questionnaire. Eating behaviors, assessed with the Three-Factor Eating Questionnaire, and comprehensive glycemic and lipid profiles were measured at both time points. Linear mixed-effects models were used to assess changes in food reward and their associations with metabolic and behavioral outcomes.
RESULTS: Twenty-nine participants (8 women and 21 men, 39.2 ± 10.7 years, initial BMI: 44.0 ± 4.7 kg/m2) completed both assessments. Explicit and implicit wanting for high-fat sweet foods significantly decreased following bariatric surgery (p < 0.01 and p < 0.001, respectively), whereas explicit liking remained unchanged. Lower implicit wanting for high-fat sweet foods was significantly associated with improvements in eating behaviors and insulin-like growth factor binding protein 2 (IGFBP-2), a marker of glucose metabolism. Exploratory mediation analyses showed that implicit wanting for high-fat sweet foods accounted for 16 to 18% of the association between IGFBP-2 and changes in eating behaviors.
CONCLUSION: Sleeve gastrectomy is associated with reduced motivational drive for high-fat sweet foods, while hedonic appreciation remains stable. These findings suggest that post-surgical metabolic adaptations may improve the control of food intake, in part by modulating implicit motivation for high-fat sweet foods.
OBJECTIVE: To characterize changes in explicit and implicit food reward following sleeve gastrectomy and to examine their associations with metabolic health and eating behaviors.
METHODS: Food reward was assessed before and 4 months after surgery using the Leeds Food Preference Questionnaire. Eating behaviors, assessed with the Three-Factor Eating Questionnaire, and comprehensive glycemic and lipid profiles were measured at both time points. Linear mixed-effects models were used to assess changes in food reward and their associations with metabolic and behavioral outcomes.
RESULTS: Twenty-nine participants (8 women and 21 men, 39.2 ± 10.7 years, initial BMI: 44.0 ± 4.7 kg/m2) completed both assessments. Explicit and implicit wanting for high-fat sweet foods significantly decreased following bariatric surgery (p < 0.01 and p < 0.001, respectively), whereas explicit liking remained unchanged. Lower implicit wanting for high-fat sweet foods was significantly associated with improvements in eating behaviors and insulin-like growth factor binding protein 2 (IGFBP-2), a marker of glucose metabolism. Exploratory mediation analyses showed that implicit wanting for high-fat sweet foods accounted for 16 to 18% of the association between IGFBP-2 and changes in eating behaviors.
CONCLUSION: Sleeve gastrectomy is associated with reduced motivational drive for high-fat sweet foods, while hedonic appreciation remains stable. These findings suggest that post-surgical metabolic adaptations may improve the control of food intake, in part by modulating implicit motivation for high-fat sweet foods.