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ClinicalTrials.gov public records Last synced Oct 4, 2026, 6:52 PM EDT

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Showing 193–216 of 453 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Bariatric Surgical Procedure Clear all
Recruiting Not applicable Interventional

Motivating Increases in Physical Activity for Prevention of Weight Regain After Metabolic Bariatric Surgery

NCT06484621
View directory record Official record
Conditions
Obesity
Interventions
Acceptance and Commitment Therapy-Based Physical Activity Intervention, Physical Activity Education Control
Behavioral
Lead sponsor
Hartford Hospital
Other
Eligibility
18 Years to 64 Years
Enrollment
164 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Hartford, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 6, 2026 · Synced Oct 4, 2026, 6:52 PM EDT
Active, not recruiting No phase listed Observational

Biological Sample Repository for Gastrointestinal Disorders

NCT05874726
View directory record Official record
Conditions
Obesity, Obesity, Morbid, Obesity, Primary, Gastro-Intestinal Disorder, Overweight and Obesity, Overweight, Overweight or Obesity, Diabetes Type 2, Diabetes Mellitus, Diabetes Mellitus, Type 2, Hypertension, Hyperlipidemias, Sleep Apnea, GERD, Gastroesophageal Reflux, Musculoskeletal Pain Disorder, Cancer
Interventions
Blood Collection, Urine Collection, Tissue Sample Collection
Diagnostic Test
Lead sponsor
Pichamol Jirapinyo, MD, MPH
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 2, 2025 · Synced Oct 4, 2026, 6:52 PM EDT
Withdrawn Phase 4 Interventional

Changes in Oral Contraceptive Hormones After Gastric Bypass Surgery

NCT01941134
View directory record Official record
Conditions
Bariatric Surgery Candidate, Contraception
Interventions
ethinyl estradiol-levonorgestrel
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 40 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 21, 2018 · Synced Oct 4, 2026, 6:52 PM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

Dietary Sugar Absorptive Phenotype for Prediction of Weight Loss Outcome

NCT05408728
View directory record Official record
Conditions
Obese, Healthy, Bariatric Surgery Candidate
Interventions
Endoscopic biopsy
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 4, 2026, 6:52 PM EDT
Completed Not applicable Interventional

A Trial of Lifestyle Interventions to Control Weight After Bariatric Surgery

NCT02603601
View directory record Official record
Conditions
Obesity, Weight Gain
Interventions
Mind-body lifestyle intervention, Standard lifestyle intervention
Behavioral
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 3, 2017 · Synced Oct 4, 2026, 6:52 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Fibrosis Lessens After Metabolic Surgery

NCT06374875
View directory record Official record
Conditions
Metabolic Dysfunction-associated Steatotic Liver Disease (MASLD), Non-Alcoholic Fatty Liver Disease, Metabolic Dysfunction-Associated Steatohepatitis (MASH), Liver Fibrosis, Obesity
Interventions
Metabolic surgery, Incretin-Based Therapy
Procedure · Drug
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 75 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2029
U.S. locations
4
States / cities
Phoenix, Arizona • Indianapolis, Indiana • Rochester, Minnesota + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 31, 2026 · Synced Oct 4, 2026, 6:52 PM EDT
Completed No phase listed Observational

The Collateral Impact of Bariatric Surgery on Families

NCT02021630
View directory record Official record
Conditions
Obesity, Bariatric Surgery Candidate, Weight Loss
Interventions
Outcomes
Other
Lead sponsor
Geisinger Clinic
Other
Eligibility
18 Years and older
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 21, 2016 · Synced Oct 4, 2026, 6:52 PM EDT
Completed No phase listed Observational

A Study of the Pre- and Post-operative Semen Analyses and Reproductive Hormone Levels of Men Undergoing Weight-reduction Surgery

NCT00596739
View directory record Official record
Conditions
Male Infertility
Interventions
Not listed
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 65 Years · Male only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 17, 2016 · Synced Oct 4, 2026, 6:52 PM EDT
Completed Phase 4 Interventional Results available

Efficacy Of Quadratus Lumborum II Block For Laparoscopic Sleeve Gastrectomy

NCT04073056
View directory record Official record
Conditions
Morbid Obesity, High BMI
Interventions
Bupivacaine
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 65 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 5, 2023 · Synced Oct 4, 2026, 6:52 PM EDT
Completed No phase listed Observational

A Complex Contraception Registry

NCT02219269
View directory record Official record
Conditions
Diabetes, Cardiovascular Disease, Epilepsy, Migraine, Neurological Disorders, Cancer, Bariatric Surgery Candidate, Organ or Tissue Transplant; Complications, Lupus Erythematosus, Systemic, Other Hematologic Conditions, Other Venous Embolism and Thrombosis
Interventions
Not listed
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
5
States / cities
Los Angeles, California • Orange, California • Sacramento, California + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 14, 2018 · Synced Oct 4, 2026, 6:52 PM EDT
Completed Not applicable Interventional

Impact of Weight Loss Surgery in Adolescents With NAFLD

NCT02952170
View directory record Official record
Conditions
NAFLD, Obesity, Adolescent
Interventions
MRI
Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
15 Years to 22 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 15, 2023 · Synced Oct 4, 2026, 6:52 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

WISE-2B Brain Study (Weight Loss Intervention Surgical Effects on Brain Function)

NCT06861790
View directory record Official record
Conditions
Diabetes, Weight Loss
Interventions
tVNS, Complete Vagotomy, Anterior Vagotomy
Behavioral · Procedure
Lead sponsor
University of Florida
Other
Eligibility
20 Years to 75 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 10, 2026 · Synced Oct 4, 2026, 6:52 PM EDT
Recruiting Not applicable Interventional

GI Oxalate Absorption

NCT05356000
View directory record Official record
Conditions
Bariatric Surgery Candidate, Kidney Stone
Interventions
Special low-oxalate diet followed by all-day visit to University of Chicago research clinic
Other
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 70 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 19, 2025 · Synced Oct 4, 2026, 6:52 PM EDT
Recruiting No phase listed Observational

Metabolic Responses to Bariatric Surgery

NCT02024542
View directory record Official record
Conditions
Morbid Obesity
Interventions
Surgery
Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 55 Years
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2035
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 18, 2026 · Synced Oct 4, 2026, 6:52 PM EDT
Completed Phase 4 Interventional

Suture Granuloma in Body Contouring Surgery

NCT00223132
View directory record Official record
Conditions
Skin Laxity of Abdomen, Thighs, Chest, Back, and Neck
Interventions
Absorbable sutures
Device
Lead sponsor
Medtronic - MITG
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 25, 2012 · Synced Oct 4, 2026, 6:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cerebrospinal Fluid Biomarkers in Bariatric Surgery

NCT04350892
View directory record Official record
Conditions
Obesity
Interventions
Roux-en-Y Gastric Bypass (RYGB), Sleeve Gastrectomy (SG), Very Low Calorie Diet (VLCD)
Procedure · Behavioral
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 28, 2026 · Synced Oct 4, 2026, 6:52 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Trial of Leptin Administration After Roux-en-Y Gastric Bypass

NCT00710814
View directory record Official record
Conditions
Overweight
Interventions
Leptin, Placebo
Drug · Other
Lead sponsor
Columbia University
Other
Eligibility
25 Years to 65 Years · Female only
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 16, 2015 · Synced Oct 4, 2026, 6:52 PM EDT
Completed Phase 2 Interventional Results available

Qsymia as an Adjunct to Surgical Therapy in the Superobese

NCT02301416
View directory record Official record
Conditions
Obesity, Metabolic Surgery, Weight Loss, Bariatric Surgery Procedures
Interventions
Phentermine/topiramate, low calorie diet
Drug · Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 70 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 4, 2019 · Synced Oct 4, 2026, 6:52 PM EDT
Completed Phase 2 Interventional Results available

Apnea, Bariatric Surgery Versus Continuous Positive Airway Pressure (CPAP) Trial

NCT01187771
View directory record Official record
Conditions
Obstructive Sleep Apnea, Obesity
Interventions
Laparoscopic Gastric Banding, Continuous Positive Airway Pressure
Procedure
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 65 Years
Enrollment
53 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 4, 2019 · Synced Oct 4, 2026, 6:52 PM EDT
Not yet recruiting Not applicable Interventional

Continuous Wearable Biometric Monitoring in Adults Undergoing Obesity Treatment (SMART-BMI)

NCT07736729
View directory record Official record
Conditions
Obesity
Interventions
Biometric-informed care, Control Arm: Standard Care
Behavioral
Lead sponsor
Jeff Reeves
Other
Eligibility
18 Years to 64 Years
Enrollment
260 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Oct 4, 2026, 6:52 PM EDT
Completed Phase 4 Interventional

Multimodal Analgesia Effect on Post Surgical Patient

NCT04240626
View directory record Official record
Conditions
Obesity, Morbid, Surgery, Bariatric Surgery Candidate
Interventions
Neurontin, Dilaudid Injectable Product, Marcaine Injectable Product, Oxycodone Hydrochloride, Hycet 7.5Mg-325Mg/15Ml Solution, Zofran Injection, Scopolamine patch, Ativan, Flexeril Oral Product, Tylenol Suspension
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
35 Years to 65 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Sep 14, 2026 · Synced Oct 4, 2026, 6:52 PM EDT
Active, not recruiting Phase 1 Interventional

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

NCT07223983
View directory record Official record
Conditions
Alcohol Use Disorder, Weight Loss, Bariatric Surgery Patients
Interventions
Semaglutide 1.0 mg
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 10, 2026 · Synced Oct 4, 2026, 6:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Lifestyle Improvement for Teens With Bariatric Surgery

NCT05393570
View directory record Official record
Conditions
Obesity, Adolescent, Bariatric Surgery Candidate
Interventions
Healthy Lifestyle Behavioral Intervention (MBS -supported intervention)
Behavioral
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
12 Years to 18 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 3, 2025 · Synced Oct 4, 2026, 6:52 PM EDT
Completed No phase listed Observational

Psychosocial Issues and Bariatric Surgery

NCT02495142
View directory record Official record
Conditions
Obesity, Eating Disorders, Bariatric Surgery Candidate, Depressive Disorder
Interventions
Not listed
Lead sponsor
Neuropsychiatric Research Institute, Fargo, North Dakota
Other
Eligibility
18 Years and older
Enrollment
202 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2019
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Aug 20, 2019 · Synced Oct 4, 2026, 6:52 PM EDT