Bariatric Surgery Clinical Trials

140 recruitingLast updated: June 17, 2026

There are 140 actively recruiting bariatric surgery clinical trials across 30 countries. Studies span Not Applicable, Phase 3, Phase 4, Early Phase 1, Phase 1, Phase 2. Top locations include Lille, France, London, United Kingdom, Lyon, France. Updated daily from ClinicalTrials.gov.


Bariatric Surgery Trials at a Glance

140 actively recruiting trials for bariatric surgery are listed on ClinicalTrialsFinder across 6 cities in 30 countries. The largest study group is Not Applicable with 69 trials, with the heaviest enrollment activity in Lille, London, and Lyon. Lead sponsors running bariatric surgery studies include Universitaire Ziekenhuizen KU Leuven, China-Japan Friendship Hospital, and Assistance Publique - Hôpitaux de Paris.

Browse bariatric surgery trials by phase

Treatments under study

About Bariatric Surgery Clinical Trials

Looking for clinical trials for Bariatric Surgery? There are currently 57 studies actively recruiting participants. Clinical trials offer access to new treatments before they are widely available, and every approved therapy in use today was first tested through a clinical trial.

Below you can browse trials, sign up for alerts when new Bariatric Surgery trials open, and view eligibility criteria for each study. Each listing includes the study phase, locations, and enrollment details.

Frequently Asked Questions

Common questions about Bariatric Surgery clinical trials

A clinical trial is a carefully designed research study that tests new medical treatments, drugs, devices, or approaches in human volunteers. Every approved medication and treatment available today was proven safe and effective through clinical trials.

All clinical trials are reviewed and approved by Institutional Review Boards (IRBs) — independent committees that evaluate patient safety. Trials follow strict protocols, and your health is monitored closely throughout. You can withdraw at any time.

Not necessarily. Many trials compare the new treatment against the current standard of care, meaning all participants receive active treatment. When placebos are used, they are typically combined with standard treatment, not given alone. The trial description will always specify the design.

Under the Affordable Care Act, most private insurers are required to cover routine patient care costs during a clinical trial. The sponsor typically covers the investigational treatment itself. Medicare also covers routine costs for qualifying trials.

Yes. Participation is completely voluntary. You can withdraw at any time, for any reason, without it affecting your access to standard medical care.

Each trial has specific eligibility criteria — including age, diagnosis, disease stage, prior treatments, and general health. Browse the trials listed above and check their eligibility sections. You can also contact the trial site directly to discuss your situation.

Showing 120 of 140 trials

Recruiting
Not Applicable

Identification of Pre-surgical Phenotypic Indicators Predictive of Quality of Life Trajectories in Obese Patients Following Bariatric Surgery

Obesity and OverweightBariatric SurgeryObesity, Morbid+4 more
Centre Hospitalier Metropole Savoie165 enrolled1 locationNCT06951893
Recruiting

Flow-Controlled vs Volume-Controlled Ventilation in Morbidly Obese Patients Undergoing Laparoscopic Bariatric Surgery

Mechanical VentilationObesity, MorbidBariatric Surgery (Sleeve Gastrectomy )
Ankara Training and Research Hospital34 enrolled1 locationNCT07641829
Recruiting
Not Applicable

Transabdominal and Laparoscopic Ultrasound in a Bariatric Setting

Gallstone DiseaseBariatric Patients Undergoing Bariatric SurgeryUltrasonic Diagnosis
Esbjerg Hospital - University Hospital of Southern Denmark130 enrolled1 locationNCT07453186
Recruiting
Not Applicable

Bariatric Surgery for the Reduction of cArdioVascular Events Randomized Controlled Trial

Cardiovascular ComplicationBariatric Surgery Candidate
Population Health Research Institute700 enrolled1 locationNCT05531474
Recruiting

Determinants of the Long-Term Success of Bariatric Surgery

Bariatric Surgery CandidateMorbid Obesity
University Hospital, Lille1,000 enrolled4 locationsNCT03517072
Recruiting

The Metabolic and Genetic Drivers of Body Composition Changes Following Weight Loss Surgery

Bariatric Surgery Patients
The University of Texas Medical Branch, Galveston110 enrolled1 locationNCT07178704
Recruiting

Improvement in Glycemic Response After Bariatric Surgery

Bariatric Surgery
Weizmann Institute of Science120 enrolled2 locationsNCT05325736
Recruiting
Not Applicable

Recovering From Bariatric Surgery: the Effects of Early Initiated and Supervised Mobilization

Bariatric SurgeryPhysical ActivityPostoperative Pain, Acute+2 more
Esbjerg Hospital - University Hospital of Southern Denmark112 enrolled1 locationNCT06222151
Recruiting
Not Applicable

Effect of Transcutaneous Electrical Nerve Stimulation on PODD in Bariatric Surgery Patients

Bariatric SurgeryBariatric Surgery Candidate
Cairo University70 enrolled2 locationsNCT07569705
Recruiting
Phase 4

2024 Tirzepatide-Bariatric Surgery

Bariatric SurgeryObesity and Obesity-related Medical Conditions
Marlene Starr50 enrolled1 locationNCT06721507
Recruiting
Phase 3

Suzetrigine-enhanced MultimOdal Opioid-sparing THerapy in Cardiac and Bariatric SURGery

Post Operative PainBariatric SurgeryCardiac Surgery With Sternotomy
Icahn School of Medicine at Mount Sinai235 enrolled1 locationNCT07539623
Recruiting
Not Applicable

Gut Microbiome and Sex as Risk Factors for Kidney Stones After Bariatric Surgery

Bariatric Surgery Candidate
University of Chicago28 enrolled1 locationNCT04590690
Recruiting
Phase 1

Semaglutide (SEMA) for Alcohol Use Disorder (AUD) After Metabolic and Bariatric Surgery (MBS)

Weight LossAlcohol Use DisorderBariatric Surgery Patients
Yale University10 enrolled1 locationNCT07223983
Recruiting

Periodontal Microbiota of Patients Candidates for Bariatric Surgery With Body Mass Index Greater Than 30

Bariatric SurgeryObesity, Morbid
University Hospital, Toulouse170 enrolled1 locationNCT06781229
Recruiting

CV Imaging of Metabolic Interventions

Heart FailureCardiovascular DiseasesBariatric Surgery Candidate
The Cleveland Clinic150 enrolled1 locationNCT05650307
Recruiting

Can Pre-operative Lean Mass Predict Weight Loss After Roux-en-Y Gastric Bypass?

Morbid Obesity Requiring Bariatric Surgery
University Hospital, Geneva91 enrolled1 locationNCT07565051
Recruiting
Not Applicable

Evaluation of the Stress Response in Anesthesia Use Inhalation Anesthetic (Desflurane) Versus TIVA for Bariatric Surgery

Opioid UseObesityBariatric Surgery Candidate+1 more
G.Gennimatas General Hospital70 enrolled1 locationNCT07568938
Recruiting

Glucose Homeostasis, Metabolomics and Pregnancy Outcomes After Bariatric Surgery

Bariatric Surgery Status Complicating Pregnancy
Universitaire Ziekenhuizen KU Leuven190 enrolled8 locationsNCT05084339
Recruiting
Not Applicable

Concurrent Exercise Effects in Post-Bariatric Patients

Obesity, OverweightPost-bariatric Surgery
Universidad Autónoma de Chile84 enrolled1 locationNCT07423780
Recruiting
Not Applicable

Evaluation of the Stress Response in Bariatric Surgery With and Without the Use of Opioids

Bariatric Surgery CandidateOpioid Use, Unspecified
G.Gennimatas General Hospital70 enrolled1 locationNCT05752799