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ClinicalTrials.gov 6 recruiting now official registry

Bariatric Surgery clinical trials

Every US clinical trial registered for Bariatric Surgery — phase mix, recruiting status, and the sponsors running them, straight from the NIH ClinicalTrials.gov registry.

16 US clinical trials · 6 currently recruiting

The research picture

Bariatric Surgery has 16 registered US clinical trials, 6 of them open to new participants right now — about 38% of the total.

6
recruiting participants now
38%
of trials open to enrollment
4
in Phase 3–4 (later-stage)
3
top sponsor: Brigham and Women's Hospital

Counts reflect the public ClinicalTrials.gov registry as last mirrored by PlainTrial. Status and phase are reported by each study's sponsor. This is reference information, not medical advice.

Active & Recent Trials

RECRUITING Phase 4 260 participants

Simethicone as Part of ERAS in Bariatric Surgery Patients

Madigan Army Medical Center

NCT06812832

RECRUITING Phase 2 150 participants

Oral Acetaminophen for Post-Op Pain Management in Bariatric Surgery Patients

Rutgers, The State University of New Jersey

NCT06658574

RECRUITING NA 54 participants

Lexion AP 50/30 Warmed Humidified Real Time CO2 Insufflation vs Airseal Recirculated CO2/Air Insufflation in Minimally Invasive Bariatric (Gastric Bypass) Surgery

The University of Texas Health Science Center, Houston

NCT05838300

RECRUITING Phase 4 50 participants

2024 Tirzepatide-Bariatric Surgery

Marlene Starr

NCT06721507

RECRUITING NA 44 participants

Mechanistic and Clinical Outcomes of a Surgical Innovation Aimed at Minimizing GERD Associated With VSG (INNOVATE-VSG)

University of California, Irvine

NCT06783751

RECRUITING Phase 1 40 participants

Physiologic Response to Bariatric Surgery and the Impact of Adjunct Semaglutide in Adolescents

University of Colorado, Denver

NCT06575738

ACTIVE NOT RECRUITING NA 44 participants

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

Brigham and Women's Hospital

NCT03482986

ACTIVE NOT RECRUITING 44 participants

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

Brigham and Women's Hospital

NCT03467906

ACTIVE NOT RECRUITING Phase 4 28 participants

Glucagon Dose-Response in Patients With Post-Bariatric Hypoglycemia

Joslin Diabetes Center

NCT06986603

COMPLETED NA 300 participants

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

Duquesne University

NCT00623792

COMPLETED 290 participants

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

Brigham and Women's Hospital

NCT03470558

COMPLETED NA 58 participants

Gaining Optimism After Weight Loss Surgery (GOALS) II

Massachusetts General Hospital

NCT04868032

COMPLETED 40 participants

Bone Loss After Laparoscopic Roux-en-Y Gastric Bypass

Gundersen Lutheran Medical Foundation

NCT00975013

COMPLETED NA 33 participants

Bariatric Scalable Internet Treatments

Yale University

NCT03680703

COMPLETED 31 participants

Impact of Monthly High Dose Oral Cholecalciferol on Serum 25 Hydroxy Vitamin D Levels in Bariatric Surgery Subjects

Texas Tech University

NCT01871389

COMPLETED Phase 3 20 participants

Effects of Gastric Bypass on Blood Levels of Duloxetine

Neuropsychiatric Research Institute, Fargo, North Dakota

NCT00989157

Phase Distribution

PhaseTrial count
Phase 1 1
Phase 2 1
Phase 3 1
Phase 4 3

Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.

Reading the Bariatric Surgery Trial Landscape

ClinicalTrials.gov lists 16 US studies indexed under Bariatric Surgery, and 6 of those are currently open to recruitment — roughly 38% of the total volume on the registry. That ratio is a useful proxy for activity level: a high share of recruiting studies often signals that research interest is current and that new enrollment opportunities are appearing, while a low share typically means the field is dominated by completed or follow-up work where most participant spots have already been filled. These counts reflect the public registry only and include studies at every stage of design, so they should be read as an index of research attention rather than as a measure of treatment availability.

The phase distribution for Bariatric Surgery shows 4 late-stage studies (Phase 3 and Phase 4 combined) alongside 2 earlier-phase entries (Phase 1 through Phase 2). Phase 1 and Phase 2 studies focus on early safety signals, dosing, and preliminary effect, while Phase 3 studies are typically the larger efficacy and safety trials submitted toward regulatory review, and Phase 4 studies follow approved interventions in real-world use. A condition weighted toward later phases often reflects a mature research pipeline with several interventions already close to or past approval, whereas a heavier early-phase tilt suggests the field is still exploring new mechanisms and candidate approaches.

Top sponsor activity for Bariatric Surgery is led by Brigham and Women's Hospital with 3 indexed trials, alongside 9 other organizations in the top contributor list. The list on this page surfaces up to 16 of the most relevant recent and active entries, ordered with recruiting studies first so practical options are visible. All figures are derived from the public ClinicalTrials.gov dataset maintained by the National Library of Medicine and are reproduced here for reference. Inclusion of a trial, sponsor, or intervention on this page is neither an endorsement nor a recommendation — eligibility, protocol changes, and site-level status can shift frequently, so always verify current details on ClinicalTrials.gov and consult a qualified healthcare provider before acting on anything you see here.

Frequently Asked Questions

How many clinical trials are there for Bariatric Surgery?

PlainTrial tracks 16 US clinical trials for Bariatric Surgery, of which 6 are currently recruiting participants. Data sourced from ClinicalTrials.gov.

How do I find a recruiting trial for Bariatric Surgery?

Use the trial list above filtered by "Recruiting" status, or visit our trial finder at /recruiting to search by condition and state. Always discuss trial participation with your healthcare provider before enrolling.

Is this data current?

Data is sourced from ClinicalTrials.gov and reflects our most recent data pull. Trial status may have changed since then. Always verify current information at ClinicalTrials.gov before making decisions about participation.

Related

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from ClinicalTrials.gov (National Library of Medicine). Consult a qualified professional before making decisions based on this data.

Source: ClinicalTrials.gov (NIH/NLM) ClinicalTrials.gov AACT registry · 2026 Trial counts and statuses sourced from ClinicalTrials.gov. Sponsor counts include both industry and federal/academic sponsors.

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