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Showing 1–24 of 668 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Metabolic surgery Clear all
Completed No phase listed Observational Results available

Taste Perception Pre and Post Bariatric Surgery

NCT01536197
View directory record Official record
Conditions
Morbid Obesity
Interventions
Gastric bypass, Gastric banding, Sleeve gastrectomy
Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
20 Years to 70 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 17, 2017 · Synced Sep 1, 2026, 5:37 PM EDT
Active, not recruiting Not applicable Interventional

Long-Term Transcutaneous Stimulation and Essential Tremor: A PET Study

NCT03778060
View directory record Official record
Conditions
Essential Tremor
Interventions
Cala TWO stimulator
Device
Lead sponsor
Mayo Clinic
Other
Eligibility
21 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Sep 1, 2026, 5:37 PM EDT
Completed No phase listed Observational

The Long Term Impact of Bariatric Surgery on Quality of Life

NCT01722279
View directory record Official record
Conditions
Obesity
Interventions
Bariatric surgery
Procedure
Lead sponsor
Ascension St. Vincent Carmel Hospital
Other
Eligibility
18 Years and older
Enrollment
414 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Carmel, Indiana
Source: ClinicalTrials.gov public record
Updated Nov 5, 2012 · Synced Sep 1, 2026, 5:37 PM EDT
Recruiting Phase 3 Interventional

Trial of IV vs Oral Iron Treatment of Iron Deficiency Anemia in the Post-Operative Bariatric Surgical Patient

NCT04268849
View directory record Official record
Conditions
Iron Deficiency Anemia
Interventions
Ferumoxytol, Saline, Ferrous sulfate tablets, Vitamin C
Drug
Lead sponsor
Auerbach Hematology Oncology Associates P C
Other
Eligibility
18 Years and older
Enrollment
104 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 2, 2025 · Synced Sep 1, 2026, 5:37 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers Results available

Positive Psychology Intervention for Patients Post-bariatric Surgery and Their Partners

NCT05958615
View directory record Official record
Conditions
Obesity, Morbid
Interventions
Reimagining Us in the Context of Bariatric Surgery (ReConnect)
Behavioral
Lead sponsor
Larissa McGarrity, Ph.D.
Other
Eligibility
18 Years and older
Enrollment
82 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Sep 1, 2026, 5:37 PM EDT
Completed No phase listed Observational

Assessment of Changes in Abdominal Fat

NCT00228579
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2020
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 4, 2022 · Synced Sep 1, 2026, 5:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Metabolomic Analysis of Hepatic Insulin Resistance

NCT01833403
View directory record Official record
Conditions
Type 2 Diabetes, Obesity
Interventions
Hyperinsulinemic-euglycemic clamp
Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 80 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 19, 2017 · Synced Sep 1, 2026, 5:37 PM EDT
Completed Phase 4 Interventional

Pain Control in Bariatric Patients: EXPAREL(R) vs. the On-Q(R) Pain Ball

NCT02142829
View directory record Official record
Conditions
Obesity
Interventions
EXPAREL, On-Q Pain Ball
Drug
Lead sponsor
Pacira Pharmaceuticals, Inc
Industry
Eligibility
18 Years to 80 Years
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated May 21, 2014 · Synced Sep 1, 2026, 5:37 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Variations in Ketone Metabolism

NCT05924295
View directory record Official record
Conditions
Ketosis
Interventions
Ketone Supplement, Beverage Tolerability Questionnaire (BTQ) and satiety visual analogue scale, Blood Draw, Urine Analysis
Dietary Supplement · Behavioral · Biological + 1 more
Lead sponsor
Ohio State University
Other
Eligibility
20 Years to 70 Years
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
2
States / cities
Novato, California • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Sep 1, 2026, 5:37 PM 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 1, 2026, 5:37 PM EDT
Completed Not applicable Interventional

A Prospective Study of Autologous Fat Grafting for Breast Augmentation

NCT00663156
View directory record Official record
Conditions
Breast Augmentation, Fat Grafting
Interventions
breast implants, Liposuction, fat grafting
Procedure
Lead sponsor
Georgetown University
Other
Eligibility
20 Years to 50 Years · Female only
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Feb 14, 2013 · Synced Sep 1, 2026, 5:37 PM EDT
Completed No phase listed Observational

Psychological Symptoms Among Adolescents Enrolled in a Bariatric Surgery Program

NCT01079377
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
12 Years to 18 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 22, 2018 · Synced Sep 1, 2026, 5:37 PM EDT
Completed Not applicable Interventional Results available

Endoscopic vs. Suction Device Calibration in Sleeve Gastrectomy

NCT03939819
View directory record Official record
Conditions
Gastrectomy, Obesity
Interventions
ViSiGi® 3D suction calibration device, Esophagogastroduodenoscopy (EGD) calibration
Device
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated May 20, 2024 · Synced Sep 1, 2026, 5:37 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Investigating the Link Between Type 2 Immunity and NAFLD in Human Obesity

NCT04232566
View directory record Official record
Conditions
Obesity, Morbid, NASH - Nonalcoholic Steatohepatitis, Chronic Inflammation
Interventions
Bariatric surgery
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
30 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced Sep 1, 2026, 5:37 PM EDT
Not listed Not applicable Interventional

The ReNEW Study: Maestro® New Enrollment Post-Approval Study Protocol

NCT03145636
View directory record Official record
Conditions
Obesity, Morbid
Interventions
vBloc Maestro Rechargeable System, vBloc Achieve Weight Management Program, Control Weight Management (CWM) program
Device · Other
Lead sponsor
ReShape Lifesciences
Industry
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
2
States / cities
Scottsdale, Arizona • Mineola, New York
Source: ClinicalTrials.gov public record
Updated May 21, 2019 · Synced Sep 1, 2026, 5:37 PM EDT
Terminated Not applicable Interventional

Early Intervention for Morbidly Obese Patients After Roux-en-Y Gastric Bypass (RYGB) Surgery

NCT01329692
View directory record Official record
Conditions
Weight Loss, Obesity
Interventions
Lifestyle counseling
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 7, 2012 · Synced Sep 1, 2026, 5:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Physical Activity Following Surgery Induced Weight Loss

NCT00692367
View directory record Official record
Conditions
Obesity
Interventions
Physical Activity
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
21 Years to 60 Years
Enrollment
128 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2012
U.S. locations
2
States / cities
Greenville, North Carolina • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 3, 2014 · Synced Sep 1, 2026, 5:37 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Biometabolic Outcomes After Weight Loss Surgery: An Individualized Approach

NCT04841057
View directory record Official record
Conditions
Obesity, Morbid, Metabolic Syndrome, NASH - Nonalcoholic Steatohepatitis
Interventions
50 cm BP limb length, 100 cm BP limb length, 150 cm BP limb length
Procedure
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 80 Years
Enrollment
750 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2031
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 31, 2025 · Synced Sep 1, 2026, 5:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Non-Invasive Reduction of Abdominal Fat

NCT01101997
View directory record Official record
Conditions
Fat Reduction
Interventions
The Zeltiq System
Device
Lead sponsor
Zeltiq Aesthetics
Industry
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
5
States / cities
Sacramento, California • Coral Gables, Florida • Hunt Valley, Maryland + 2 more
Source: ClinicalTrials.gov public record
Updated Dec 20, 2020 · Synced Sep 1, 2026, 5:37 PM EDT
Completed No phase listed Observational Results available

Effects of Gastric Bypass Surgery and Calcium Metabolism and the Skeleton

NCT01330914
View directory record Official record
Conditions
Obesity, Morbid, Gastric Bypass
Interventions
Not listed
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
25 Years to 70 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 14, 2019 · Synced Sep 1, 2026, 5:37 PM EDT
Completed No phase listed Observational

Taste Changes With Bariatric Surgery

NCT03548038
View directory record Official record
Conditions
Taste, Altered
Interventions
taste test
Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
21 Years to 70 Years · Female only
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
2
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 1, 2020 · Synced Sep 1, 2026, 5:37 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Changes in Body Composition Following Bariatric Surgery

NCT02148068
View directory record Official record
Conditions
Obesity
Interventions
Bariatric Surgery
Procedure
Lead sponsor
Peter Nau
Other
Eligibility
18 Years to 65 Years
Enrollment
136 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Nov 19, 2018 · Synced Sep 1, 2026, 5:37 PM EDT
Completed No phase listed Observational

Study to Evaluate Blood Cell Lines From Patients With Gaucher Disease

NCT00351156
View directory record Official record
Conditions
Gaucher Disease
Interventions
Blood sample
Procedure
Lead sponsor
Amicus Therapeutics
Industry
Eligibility
Not listed
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
7
States / cities
San Francisco, California • Coral Springs, Florida • Decatur, Georgia + 4 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2010 · Synced Sep 1, 2026, 5:37 PM EDT
Completed Not applicable Interventional

Database and Registry for Renal Diverticulum

NCT00169715
View directory record Official record
Conditions
Kidney Stones, Renal Calculi, Tic
Interventions
Percutaneous Caliceal Diverticuli
Procedure
Lead sponsor
Indiana Kidney Stone Institute
Other
Eligibility
18 Years and older
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2007
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 17, 2008 · Synced Sep 1, 2026, 5:37 PM EDT