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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Bariatric Surgery Procedures Clear all
Completed Not applicable Interventional

Mechanisms of Diabetes Relapse After Bariatric Surgery

NCT01516320
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Roux-en-Y Gastric Bypass, Laparoscopic adjustable gastric banding, Vertical Sleeve Gastrectomy
Procedure
Lead sponsor
Blandine Laferrere
Other
Eligibility
18 Years to 65 Years
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 31, 2017 · Synced Sep 28, 2026, 12:07 AM EDT
Completed Phase 1 Interventional Results available

PET Imaging and Bariatric Surgery

NCT00801827
View directory record Official record
Conditions
Obesity, Morbid
Interventions
F-18 (fallypride)
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 16, 2017 · Synced Sep 28, 2026, 12:07 AM EDT
Completed Phase 4 Interventional Results available

Denosumab to Prevent High-Turnover Bone Loss After Bariatric Surgery

NCT04087096
View directory record Official record
Conditions
Bariatric Surgery Candidate, Bone Loss
Interventions
Denosumab, Placebo, Zoledronic Acid
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
25 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
2
States / cities
San Francisco, California • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 28, 2025 · Synced Sep 28, 2026, 12:07 AM EDT
Active, not recruiting No phase listed Observational

Role of Dietary Habits in Efficacy of Bariatric Surgery - Study B

NCT03467906
View directory record Official record
Conditions
Bariatric Surgery, Sleeve Gastrectomy, Obesity
Interventions
In-laboratory assessment
Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
22 Years to 62 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 3, 2025 · Synced Sep 28, 2026, 12:07 AM EDT
Completed No phase listed Observational Results available

Diabetes and Gastric By- Pass

NCT01153516
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
Not listed
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 26, 2019 · Synced Sep 28, 2026, 12:07 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

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

NCT07178704
View directory record Official record
Conditions
Bariatric Surgery Patients
Interventions
Not listed
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 65 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Sep 28, 2026, 12:07 AM EDT
Terminated Not applicable Interventional

Vitamin D to Improve Nutrition Prior to Bariatric Surgery and Investigate the Relationship With Negative Outcomes

NCT02212652
View directory record Official record
Conditions
Vitamin D Deficiency, Vitamin D Insufficiency
Interventions
Vitamin D, Placebo, Standard of Care
Dietary Supplement · Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 64 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 5, 2019 · Synced Sep 28, 2026, 12:07 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin Supplementation After Bariatric Surgery

NCT02686905
View directory record Official record
Conditions
Complications of Bariatric Procedures, Avitaminosis
Interventions
Chewable Multivitamin with Iron, PatchMD Vitamin D3/Calcium Patch, PatchMD Multivitamin Patch, PatchMD B12 Energy Plus Patch, Chewable Calcium, Quick Dissolve B12
Dietary Supplement
Lead sponsor
California State Polytechnic University, Pomona
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Brea, California
Source: ClinicalTrials.gov public record
Updated Sep 29, 2016 · Synced Sep 28, 2026, 12:07 AM 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 18, 2025 · Synced Sep 28, 2026, 12:07 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Alcohol and Bariatric Surgery

NCT02766322
View directory record Official record
Conditions
Obesity
Interventions
Oral Alcohol challenge test Alcohol visit first, Oral Alcohol challenge test Placebo visit first, Intravenous Alcohol Challenge Test (Clamp), Intravenous Alcohol Self-administration Test
Other
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
21 Years to 64 Years · Female only
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 10, 2025 · Synced Sep 28, 2026, 12:07 AM EDT
Completed Not applicable Interventional

Probiotic Supplementation on Weight Loss

NCT03832439
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Probiotic, microcrystalline cellulose
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 20, 2022 · Synced Sep 28, 2026, 12:07 AM EDT
Terminated Not applicable Interventional Results available

Surgical Intervention in Bariatric Patients: Excess Weight Loss in the Morbidly Obese Following Gastric Plication

NCT01077193
View directory record Official record
Conditions
Morbid Obesity
Interventions
Gastric Plication
Procedure
Lead sponsor
Ethicon Endo-Surgery
Industry
Eligibility
18 Years to 65 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
2
States / cities
Cleveland, Ohio • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 6, 2014 · Synced Sep 28, 2026, 12:07 AM EDT
Completed No phase listed Observational

Gastric Bypass After Previous Anti-reflux Surgery

NCT01041105
View directory record Official record
Conditions
Clinically Severe Obesity, Gastroesophageal Reflux Disease
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 60 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Dec 31, 2009 · Synced Sep 28, 2026, 12:07 AM 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 4, 2023 · Synced Sep 28, 2026, 12:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mother and Child Health Outcomes After Maternal Bariatric Surgery

NCT03297307
View directory record Official record
Conditions
Weight Loss
Interventions
Presurgical Counseling
Behavioral
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years to 55 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 27, 2023 · Synced Sep 28, 2026, 12:07 AM EDT
Completed No phase listed Observational

Prophylactic Use of Enoxaparin in Morbidly Obese Adolescents During Bariatric Surgery

NCT01587781
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
Janelle Vaughns
Other
Eligibility
12 Years to 20 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2021
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Mar 16, 2022 · Synced Sep 28, 2026, 12:07 AM EDT
Completed Not applicable Interventional

Study on Impact of Lifestyle Change and Weight Loss Before Bariatric Surgery

NCT00623792
View directory record Official record
Conditions
Severe Obesity, Bariatric Surgery
Interventions
Preoperative lifestyle Intervention
Behavioral
Lead sponsor
Duquesne University
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 16, 2016 · Synced Sep 28, 2026, 12:07 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Single Anastomosis Duodenal Ileal Bypass (SADI) for Sleeve Revision

NCT04165694
View directory record Official record
Conditions
Bariatric Surgery Candidate, Severe Obesity
Interventions
Single Anastomosis Duodenal Ileal Bypass (SADI)
Procedure
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years to 100 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Sep 28, 2026, 12:07 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Human Biomarkers for Assessing Copper Deficiency

NCT01177579
View directory record Official record
Conditions
Copper Deficiency
Interventions
Copper gluconate
Dietary Supplement
Lead sponsor
Purdue University
Other
Eligibility
18 Years to 65 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2018
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Apr 18, 2017 · Synced Sep 28, 2026, 12:07 AM EDT
Completed Not applicable Interventional

Bariatric Scalable Internet Treatments

NCT03680703
View directory record Official record
Conditions
Bariatric Surgery, Weight Loss
Interventions
Guided Self-Help Behavioral Weight Loss
Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years to 70 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 6, 2020 · Synced Sep 28, 2026, 12:07 AM EDT
Completed Phase 4 Interventional Results available

Pilot Study for Zoledronic Acid to Prevent Bone Loss After Bariatric Surgery

NCT03424239
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Zoledronic Acid, Calcium citrate + vitamin D, Vitamin D3
Drug · Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
25 Years to 100 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 28, 2021 · Synced Sep 28, 2026, 12:07 AM EDT
Completed No phase listed Observational

Bariatric Surgery and Weight Loss on Energy Metabolism and Insulin Sensitivity

NCT00936130
View directory record Official record
Conditions
Obesity, Protein-energy; Imbalance, Insulin Sensitivity, Gastrointestinal Complication
Interventions
Laparoscopic Roux-en-Y gastric bypass, Laparoscopic gastric banding, Laparoscopic sleeve gastrectomy, Low Calorie Diet
Procedure · Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Dec 3, 2015 · Synced Sep 28, 2026, 12:07 AM EDT
Completed No phase listed Observational

Microbes and Bariatric Surgery

NCT01130207
View directory record Official record
Conditions
Obesity, Diabetes, Periodontal Disease
Interventions
Not listed
Lead sponsor
State University of New York - Upstate Medical University
Other
Eligibility
18 Years to 65 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Nov 18, 2014 · Synced Sep 28, 2026, 12:07 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Safety and Feasibility of ActivSightTM in Human

NCT04633512
View directory record Official record
Conditions
Acute Cholecystitis, Colorectal Cancer, Diverticulitis, Colonic, Obesity, Morbid, Inflammatory Bowel Diseases
Interventions
ActivSight
Device
Lead sponsor
Activ Surgical
Industry
Eligibility
18 Years and older
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
3
States / cities
Buffalo, New York • Houston, Texas • Sugar Land, Texas
Source: ClinicalTrials.gov public record
Updated Feb 20, 2024 · Synced Sep 28, 2026, 12:07 AM EDT