The Influence of Obesity and Insulin Sensitivity on Reward Processing and Decision Making

Starting soon · Not applicable

Conditions studied: Adiposity, Insulin Sensitivity/Resistance, Decision-Making, Reward Learning

In brief

Reward learning and decision-making processes, which operate largely outside of conscious control, shape food choices and eating behaviors. Excess adiposity is associated with differences in brain structure and functional connectivity underlying these processes, and insulin resistance, which commonly co-occurs with excess adiposity, has been linked with dopamine signaling that is crucial for these processes. However, whether and how excess adiposity and insulin resistance affect reward learning and decision-making remains poorly understood. This study will address that gap, examining the effects of excess adiposity and insulin resistance, and their interaction, on processes of reward learning and decision-making in food-specific and general contexts.

Key facts

Study ID

NCT07638059

Run by

Virginia Polytechnic Institute and State University

People needed

50

Starts

2026-07-01

Expected to finish

2029-07-01

Last updated by the study team

2026-06-10

Who can join

Age: 18 and older, up to 45. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• 18 to 45 years of age
• Self-reported weight stable (within 5 lbs) for previous 3 months
• Not pregnant or planning to become pregnant during study participation
• Weigh more than 110 lbs (due to blood draws used in study)
• Residing in Roanoke, VA, area and/or willing to attend sessions at the Fralin Biomedical Research Institute

You may not qualify if…

• BMI < 18.5 or > 40 kg/m2
• Hemoglobin A1c > 6.4%
• Fasting blood glucose > 126 mg/dL
• 2-hour blood glucose > 200 mg/dL
• Self-reported current diagnosis of diabetes or other endocrine/metabolic disorder
• Self-reported current inhaled nicotine use
• Self-reported history of alcohol dependence
• Self-reported use of medications known to influence study measures (including antiglycemic agents, thyroid medications, etc.)
• Self-reported neurological or psychological disorder
• Self-reported claustrophobia or discomfort with mock fMRI training
• Self-reported history of head injury resulting in loss of consciousness for more than 10 minutes
• Contraindications to MRI, including pacemaker, aneurysm clip, neurostimulator, cochlear implant, metal in eyes, steel worker, other implants
• Self-reported previous metabolic/weight loss surgery
• Self-reported adherence to special or restrictive diet within the past 3 months (e.g., low-carb, ketogenic, exclusion of food groups/specific macronutrients, etc.)
• Self-reported allergy to ingredient used in the study drinks

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.