Condition

Bariatric Surgery Candidate clinical trials and research

• 47Clinical trials
• 18Countries

Newest Bariatric Surgery Candidate clinical trials

All recruiting trials (47)

• Transcutaneous Nerve Stimulation to Help Breathing After Bariatric Surgery

  A randomized trial tests whether a skin-placed nerve stimulator can reduce diaphragmatic dysfunction after bariatric surgery in people with obesity.

  Recruiting Cairo University · Cairo and 1 other locations · NCT07569705

• Stress response with desflurane versus opioid-free TIVA during weight-loss surgery

  This study will test whether adding the inhaled anesthetic desflurane to opioid-free anesthesia changes the body's perioperative stress response in people having bariatric (weight-loss) surgery.

  Recruiting G.Gennimatas General Hospital · Athens · NCT07568938

• Autonomic Nerve Blockade to Reduce Pain and Nausea After Bariatric Surgery

  This study tests whether an autonomic nerve block given during bariatric surgery can lessen pain and nausea and decrease the need for anti-nausea and pain medicines in the first 72 hours after sleeve gastrectomy or gastric bypass.

  Recruiting Endeavor Health · Evanston, Illinois · NCT07104825

• Effects of bile acids on glucose metabolism after gastric bypass surgery

  This study is testing how bile acids affect blood sugar levels in people who have had gastric bypass surgery by giving some participants a medication and comparing their results to others.

  Recruiting Early Phase 1 Hvidovre University Hospital · Hvidovre · NCT06925997

• Evaluating anesthesia techniques for reducing inflammation in bariatric surgery

  This study tests different anesthesia methods during bariatric surgery to see which one helps reduce inflammation and supports better recovery for patients.

  Recruiting Hospital HM Nou Delfos · Barcelona, Barcelona · NCT06915558

• Ketogenic diet before bariatric surgery

  This study is testing if a very low-calorie ketogenic diet can help people lose weight and reduce liver size before bariatric surgery, compared to a standard low-calorie diet.

  Recruiting Maxima Medical Center · Veldhoven, North Brabant · NCT06850493

• Examining chronic pain improvement after weight loss surgery in specific ethnic groups

  This study is testing if weight loss surgery can help reduce chronic pain in Hispanic/Latino and non-Hispanic Black adults with higher body weight.

  Recruiting at 3 sites New York University · New York, New York and 2 other locations · NCT06795386

• Comparing conventional and tailored limb lengths in gastric bypass surgery

  This study is testing whether customizing the lengths of certain parts of gastric bypass surgery can help people lose more weight and improve their health compared to standard lengths.

  Recruiting GEM Hospital & Research Center · Coimbatore, Tamil Nadu · NCT06756789

• Comparing rivaroxaban and enoxaparin for preventing blood clots in obese patients undergoing weight loss surgery

  This study tests whether the blood thinner rivaroxaban works better than enoxaparin to prevent blood clots in obese patients having weight loss surgery.

  Recruiting Alexandria University · Alexandria · NCT06689241

• Education to improve drinking habits and oral hygiene for people having bariatric surgery

  This project will test three types of patient education—a custom website, clinician-led sessions, or free dental-hygiene samples—to see which best helps people having bariatric surgery improve drinking habits and oral care.

  Recruiting St. Olavs Hospital · Trondheim · NCT06617689

• Personalized physical activity program for bariatric surgery candidates

  This study is testing a personalized exercise program for people with severe obesity who are about to have bariatric surgery to see if it helps reduce harmful chemicals in their blood and improves their health after losing weight.

  Recruiting Centre Hospitalier Universitaire de Nice · Nice · NCT06597617

• High-intensity interval exercise to support brain activity and weight maintenance

  This trial will test whether a 12-week high-intensity interval training (HIIT) program changes brain activity and helps with weight maintenance in adults 18–70, including people who regained weight after bariatric surgery.

  Recruiting Joslin Diabetes Center · Boston, Massachusetts · NCT06511310

• Effect of Bariatric Surgery on Urinary Symptoms

  This study is testing how bariatric surgery affects urinary symptoms in people with severe obesity compared to those who don't have the surgery.

  Recruiting Chinese University of Hong Kong · Hong Kong · NCT06464822

• Comparing Ready-to-Eat Meals with Standard Care for Bariatric Surgery Preparation

  This study is testing if ready-to-eat low-calorie meals can help people preparing for bariatric surgery stick to their diet better and feel more satisfied compared to regular liquid meal replacements.

  Recruiting at 2 sites National University Hospital, Singapore · Singapore and 1 other locations · NCT06461247

• Comparing robotic and laparoscopic sleeve gastrectomy for obesity treatment

  This study is testing whether robotic sleeve gastrectomy works better than laparoscopic sleeve gastrectomy for people with obesity in terms of pain, recovery, and quality of life after surgery.

  Recruiting The Cleveland Clinic · Cleveland, Ohio · NCT06425016

• Examining the effects of bariatric surgery on heart disease and mortality

  This study is trying to see if different types of weight-loss surgery can help people with obesity lower their risk of heart disease and live longer compared to those who don't have surgery.

  Recruiting Karolinska Institutet · Stockholm · NCT06420479

• Remote intervention for weight regain after bariatric surgery

  This study is testing if a new remote program can help people who have gained weight after bariatric surgery lose that weight and improve their health.

  Recruiting at 2 sites Temple University · Chicago, Illinois and 1 other locations · NCT06292936

• Understanding genetic factors that affect weight loss after bariatric surgery

  This study is trying to find out if certain genes can help predict how well people with severe obesity will lose weight after having bariatric surgery.

  Recruiting Institut de Recerca Biomèdica de Lleida · Lleida, Leida · NCT06226194

• Anemia after bariatric surgery

  We will follow people aged 16–70 having sleeve gastrectomy or Roux-en-Y gastric bypass to see how often anemia develops soon after surgery and over the long term and what factors predict it.

  Recruiting China-Japan Friendship Hospital · Beijing · NCT06198790

• Individualized PEEP for improving lung function in obese patients after bariatric surgery

  This study tests whether using a personalized breathing support technique can help obese patients breathe better and avoid lung problems after weight loss surgery.

  Recruiting Ain Shams University · Cairo, Cairo Governorate · NCT06168162

• Identifying predictors of weight loss and metabolic health after bariatric surgery

  This study is trying to find out what factors can help predict how well people with insulin resistance will lose weight and improve their health after having bariatric surgery.

  Recruiting Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) · Gouda, South Holland and 2 other locations · NCT05987631

• Evaluating Cholestyramine's Effect on Obese Women Before Bariatric Surgery

  This study is testing if a medication called cholestyramine can help reduce harmful chemicals in the bodies of obese women before they have weight loss surgery.

  Recruiting Centre Hospitalier Universitaire de Nice · Nice, Alpes-Mritimes · NCT05966727

• Comparing the effects of bariatric arterial embolization and gastric bypass on obesity and diabetes

  This study is testing whether a new procedure called bariatric arterial embolization can help people with obesity and Type 2 diabetes just as well as the traditional gastric bypass surgery.

  Recruiting Universidade Nova de Lisboa · Lisbon · NCT05859022

• Diet workshop for improving protein intake after bariatric surgery

  This study tests whether a dietary workshop can help people who had bariatric surgery improve their protein intake for better recovery and health.

  Recruiting University Hospital, Clermont-Ferrand · Clermont-Ferrand · NCT05695040

• Examining heart changes in patients undergoing rehabilitation or bariatric surgery

  This study is testing how heart changes in people improve after they go through rehabilitation or weight-loss surgery to see if these changes can help spot heart problems early.

  Recruiting The Cleveland Clinic · Cleveland, Ohio · NCT05650307

• Switching a failed sleeve gastrectomy to SADI-S, RYGB, or OAGB

  This tests three surgical options—SADI-S, RYGB, and OAGB—for people who regained weight after a sleeve gastrectomy to see which gives the best weight loss, complication profile, and nutritional outcomes.

  Recruiting General Committee of Teaching Hospitals and Institutes, Egypt · Alexandria, Alexandria Governorate · NCT05608772

• Data bank for understanding mental health in bariatric surgery candidates

  This study looks at how mental health issues affect people who are considering weight loss surgery to help doctors better understand and support their needs.

  Recruiting Laval University · Québec, Quebec · NCT05602805

• Bariatric surgery to reduce cardiovascular events in obese patients

  This study tests if bariatric surgery can help people with severe obesity and heart disease lower their risk of serious heart problems better than just medical weight management.

  Recruiting Population Health Research Institute · Hamilton, Ontario · NCT05531474

• Understanding why some patients don't lose weight after bariatric surgery

  This study is trying to find out why some people don’t lose as much weight as expected after bariatric surgery, focusing on the role of gut hormones to help improve their results.

  Recruiting Imperial College London · London · NCT05404061

• Understanding how oxalate affects kidney stone formation in bariatric surgery candidates

  This study is testing how a low-oxalate diet affects kidney stone formation in people who are planning to have weight loss surgery and those who already have kidney stones.

  Recruiting University of Chicago · Chicago, Illinois · NCT05356000

• Repairing the esophagus during weight loss surgery for patients with a weak valve

  This study tests if fixing a hiatal hernia during weight loss surgery can help people with a weak valve have fewer problems like acid reflux and esophagus damage after their surgery.

  Recruiting at 2 sites Sengkang General Hospital · Singapore and 1 other locations · NCT05330910

• Impact of a preoperative exercise program on patients awaiting bariatric surgery

  This study tests if a four-week exercise program can help people getting ready for bariatric surgery improve their fitness, metabolism, and weight.

  Recruiting University College, London · London · NCT05235945

• Examining gut microbiota changes in patients undergoing metabolic surgery

  This study is testing how metabolic surgery affects gut bacteria and heart health in patients, especially focusing on the African American community, over the next 10 years.

  Recruiting Vanderbilt University Medical Center · Nashville, Tennessee · NCT05000996

• Magnetic bariatric revisional surgery for weight loss and GERD resolution

  This study tests if a new type of weight loss surgery using magnets can help people with obesity and acid reflux feel better after previous weight loss surgeries.

  Recruiting Unidad Internacional de Cirugia Bariatrica y Metabolica · Maracaibo, Zulia · NCT04945304

• Low-calorie, high-protein diet before weight-loss surgery

  This project will try whether a short low-calorie, high-protein diet before sleeve gastrectomy reduces liver fat and weight in adults with severe obesity.

  Recruiting at 3 sites University Hospital, Rouen · Dieppe and 2 other locations · NCT04942093

• Assessing gum disease in obese patients preparing for weight loss surgery

  This study looks at how common and serious gum disease is in obese people getting ready for weight loss surgery and checks if there's a link between gum health and certain genes or inflammation in their saliva.

  Recruiting at 4 sites Queen Mary University of London · London and 3 other locations · NCT04851470

• Survey on bariatric surgery for adolescents

  This study is trying to see how well laparoscopic adjustable gastric banding works for teenagers aged 14-20 who are having bariatric surgery, focusing on weight loss and any health issues that might come up.

  Recruiting University Hospital, Angers · Angers, Maine Et Loire · NCT04766801

• Understanding how diet and sex affect kidney stone risk after bariatric surgery

  This study tests how diet and gender affect the chances of getting kidney stones in people who have weight loss surgery.

  Recruiting University of Chicago · Chicago, Illinois · NCT04590690

• Registry for Endoscopic Bariatric Therapies

  This study is collecting information to see how well different non-surgical weight loss treatments work for people who can't have traditional weight loss surgery.

  Recruiting Weill Medical College of Cornell University · New York, New York · NCT04494048

• Effectiveness of bariatric surgery for patients with liver disease

  This study is testing how well different types of weight loss surgery can help obese people with liver disease feel better and improve their liver health.

  Recruiting Beijing Friendship Hospital · Beijing, Beijing Municipality · NCT04366999

• Registry for bariatric surgery quality control

  This study is setting up a registry to track the results and safety of bariatric surgery for people who are severely obese to help improve surgical practices.

  Recruiting Sheba Medical Center · Ramat Gan · NCT04040413

• Bariatric surgery combined with progestin therapy for young women with endometrial cancer

  This study is testing if combining weight loss surgery with hormone treatment can help young women with early-stage endometrial cancer keep their fertility and improve their treatment outcomes.

  Recruiting University Health Network, Toronto · Toronto, Ontario · NCT04008563

• Factors that determine long-term success after bariatric surgery

  We will see which patient and surgical factors are linked to lasting weight loss in people who had bariatric surgery at least five years ago.

  Recruiting at 4 sites University Hospital, Lille · Arras and 3 other locations · NCT03517072

• Biorepository for liver disease samples

  This study is collecting samples from patients with liver diseases to help researchers find better treatments and improve care for these conditions.

  Recruiting State University of New York at Buffalo · Buffalo, New York · NCT03025074

• Comparing surgery and medical management for long-term diabetes remission

  This study is testing whether different types of weight-loss surgery can help people with type 2 diabetes improve their health more than just taking medication.

  Recruiting Laval University · Québec, Quebec · NCT02390973

• Long-term follow-up of severely obese patients after bariatric surgery

  This study is trying to see how well different types of weight loss surgery work for severely obese patients over the long term and how it affects their health and quality of life.

  Recruiting University Hospital, Montpellier · Montpellier · NCT02310178

• Examining HDL and inflammation in diabetes and obesity

  This study looks at how HDL cholesterol and inflammation affect heart health in people with diabetes and obesity who are having weight loss surgery.

  Recruiting Manchester University NHS Foundation Trust · Manchester, Lancashire · NCT02169518

Related topics

Quick answers

How many Bariatric Surgery Candidate clinical trials are recruiting right now?

47, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.

Where are these trials running?

In 18 countries. The most sites are in United States (11 trials), France (7 trials), Egypt (4 trials), United Kingdom (4 trials), Canada (4 trials). Each study page lists its sites and which ones are recruiting.

What phases are they in?

Early Phase 1: 1. Trials with no phase listed are usually device, behavioural or observational studies.

How do I join one?

Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.

Find the studies that fit you

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