Obesity

Differentiating the abnormalities of food and monetary reward cue processing associated with overweight/obesity: an Activation Likelihood Estimation (ALE) meta-analysis

Int J Obes (Lond)Published Systematic review and meta-analysis

Authors' conclusion

Obesity represents a critical global health challenge, yet the neurocognitive distinctions in processing different rewards among individuals with OW/OB remain poorly characterized. Our findings reveal both dissociable and overlapping neural alterations during the processing of primary (food) versus secondary (monetary) rewards in OW/OB, implicating altered reward sensitivity, decision-making, and inhibitory control. The results underscore the necessity for reward-type-specific interventions targeting these neural mechanisms to address obesity-related dysregulation. Contrasts in brain activation during food and monetary reward processing between individuals with overweight/obesity (OW/OB) and normal weight (NW).

Study context

Population
Individuals with OW/OB vs NW controls in fMRI studies of food or monetary reward cue processing; Web of Science, PubMed, PsycInfo to May 2025
Participants
1,065 individuals26 studies
Comparison
OW/OB vs NW controls during food and monetary reward cue processing
Outcome
Brain activation during food and monetary reward cues, OW/OB vs NW
Methodological detailsActivation Likelihood Estimation (ALE), functional MRI
  • Activation Likelihood Estimation (ALE)
  • Functional MRI

Pooled result

As reported in the abstract

  • Both reward types: overlapping reduced activation in left posterior cingulate cortex (PCC) and insula
  • Left middle frontal gyrus: decreased activation to food cues, increased to monetary cues
  • Food reward: increased activation in bilateral caudate nucleus, hippocampus, anterior cingulate cortex (ACC) and medial prefrontal cortex; decreased amygdala responses
  • Monetary reward: increased activation in right lateral nucleus and hypothalamus; decreased in right subthalamic nucleus and posterior ventral lateral nucleus
  • 6 monetary reward and 20 food reward studies

Original publication

Differentiating the abnormalities of food and monetary reward cue processing associated with overweight/obesity: an ALE meta-analysis. Int J Obes (Lond). Published 3 February 2026. doi:10.1038/s41366-026-02026-1

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