Clinical trials
Bariatric Surgery clinical trials
Below are recruiting bariatric surgery clinical trials, each written for real people, not researchers. We’re tracking 237 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT02857179Recruiting
Study of Bariatric Surgery
This study is looking at people who have already had bariatric (weight-loss) surgery. If you’ve had that surgery and are within the age range, you may be eligible to participate.
LyonAges 16–80 - NCT04945304Recruiting
9-Step magnetic revisional weight-loss surgery
This trial studies a specific 9-step approach using magnetic technology for people having revisional bariatric (weight-loss) surgery. It may help improve how safely and effectively surgery is done for people who qualify.
Maracaibo, ZuliaAges 18–65 - NCT04432025Recruiting
Medication after weight-loss surgery for type 2 diabetes
This trial looks at whether a specific diabetes medicine given after bariatric (weight-loss) surgery can improve blood sugar control in people with type 2 diabetes. You might be considered if you are eligible for this surgery and meet the weight criteria.
DublinAges 18 years+ - NCT04583150Recruiting
Study of fertility and ovarian reserve after weight-loss surgery
This study looks at how ovarian reserve (a fertility-related marker) changes in women after bariatric (weight-loss) surgery versus women with obesity who are not planning surgery. It may help doctors better understand fertility timing and risks around weight-loss treatment.
AngersAges 18–37 - NCT06275061Recruiting
Obesity and metabolic surgery database study
This trial is building a database of people with obesity who have had or are planning to have weight loss surgery (metabolic or bariatric surgery). It helps doctors learn more about long-term results and safety.
Guangzhou, GuangdongAges Any age - NCT06226194Recruiting
Genes and weight loss after bariatric surgery
This study looks at how your genes might affect how much weight you lose after gastric sleeve or gastric bypass surgery. You may be able to help doctors better predict weight loss results for future patients.
Lleida, LeidaAges 18–65 - NCT04040413Recruiting
Database update for bariatric weight-loss surgery
This trial is a “database maintenance” study related to bariatric (weight-loss) surgery. It helps keep the records up to date and may support future care by organizing information about patients who get surgery.
Ramat GanAges Any age - NCT06420479Recruiting
How weight-loss surgery affects heart disease risk
This study looks at how weight-loss surgery (bariatric surgery) affects the chances of developing heart disease or dying early. It may help you if you have obesity but have never had heart problems or cancer before.
StockholmAges 18 years+ - NCT06464822Recruiting
Effects of weight-loss surgery on urinary symptoms
This study looks at whether weight-loss surgery can improve urinary symptoms like needing to pee often or suddenly. It is for people with severe obesity who are already being seen at a specific clinic for bariatric surgery.
Hong KongAges 18 years+ - NCT06661174Recruiting
Weight loss surgery study for diabetes with kidney problems
This study tests if bariatric surgery can help people whose diabetes is quickly damaging their kidneys. It may slow down kidney disease and improve health.
Beijing, Beijing MunicipalityAges 18–65 - NCT07672821Recruiting
Time-restricted eating after weight-loss surgery
This study tests if time-restricted eating (eating only during a set window of hours each day) helps people who have had weight-loss surgery but either didn't lose enough weight or regained weight after surgery. It also includes people with obesity who haven't had surgery.
Bursa, Lütfen Seçiniz.Ages 18–65 - NCT05859022Recruiting
Bariatric treatment methods compared for diabetes and metabolism
This trial compares a less invasive heart/artery-based bariatric treatment (bariatric arterial embolization) with standard weight-loss surgery to see how they affect metabolism and type 2 diabetes. You might be considered if you have obesity with type 2 diabetes and have not had prior bariatric surgery.
LisbonAges 18–75 - NCT07569705Recruiting
Nerve Stimulation to Help Breathing After Weight-Loss Surgery
This trial tests whether electrical nerve stimulation (a non-invasive, pain-relieving technique) can help improve breathing problems that sometimes occur after weight-loss surgery. The study measures how well your diaphragm—the muscle that helps you breathe—works after the procedure.
CairoAges 20–60 - NCT06738875Recruiting
Cuff pressure changes in weight loss surgery
This study looks at how the pressure in the breathing tube changes during weight loss surgery. It aims to help make the procedure safer and more comfortable.
Kayapınar, Di̇yarbakirAges 18–70 - NCT07539623RecruitingPhase 3
Pain relief with suzetrigine after heart or weight-loss surgery
This study tests whether suzetrigine, a new pain medication, can reduce the need for opioids (strong painkillers) after cardiac or bariatric surgery. The goal is to help patients manage pain with fewer opioid-related side effects.
New York, New YorkAges 18–85 - NCT07515391Enrolling by invitationPhase 2
Blood Sugar Control After Weight-Loss Surgery
This trial tests whether a diabetes medication called dapagliflozin helps smooth out blood sugar swings after bariatric (weight-loss) surgery. It may help people with type 2 diabetes achieve better control after their surgery.
Kuwait City, DasmanAges 21–70 - NCT06192693RecruitingPhase 3
Fecal transplant to improve diabetes after weight loss surgery
This trial tests whether transferring healthy stool bacteria from a lean donor can help improve blood sugar control in people with type 2 diabetes who still have high blood sugar 1-5 years after weight loss surgery.
ParisAges 18–65 - NCT06850493Recruiting
Ketogenic Diet Before Weight-Loss Surgery
This study tests whether following a ketogenic diet (a low-carb, high-fat eating plan) before weight loss surgery can improve your health and recovery. You will be asked to follow the diet for a few weeks before your scheduled Roux-en-Y gastric bypass.
Veldhoven, North BrabantAges 18–65 - NCT04008563Recruiting
Weight-loss surgery to protect fertility in early womb cancer
This study tests whether bariatric (weight-loss) surgery can help treat certain early, low-grade womb changes while preserving fertility. It’s mainly for people with a higher BMI who want to have children and have an early stage diagnosis confirmed by scans.
Toronto, OntarioAges 18–41 - NCT07293624Enrolling by invitation
Diet and inflammation after weight-loss surgery
This study looks at how your diet affects inflammation and stomach symptoms after weight-loss surgery. You'll fill out food records and have blood tests to see how your eating habits relate to your health.
Istanbul, UskudarAges 18–65 - NCT07286968Recruiting
Digestion Study After Weight-Loss Surgery
This study looks at how digestion works after weight-loss surgery. Volunteers may be people with obesity or those who had gastric bypass or sleeve gastrectomy at least a year ago. The goal is to learn more about gut function after surgery.
LeuvenAges 18–65 - NCT07180316Recruiting
Comparing robotic vs. laparoscopic surgery for weight loss revision
This trial compares two types of surgery (robotic and laparoscopic) to see which leads to fewer problems after a second weight-loss operation. It is for people who need to revise their first bariatric surgery to a Roux-en-Y gastric bypass.
LyonAges 18–70 - NCT07156552Recruiting
Protein and exercise to prevent muscle loss after weight loss surgery
This trial tests whether taking extra protein and doing resistance training helps people keep their muscle mass after bariatric surgery (stomach reduction or gastric bypass). If you're scheduled for this surgery and can follow the program, you may be able to join.
AmsterdamAges 18 years+ - NCT07137117Recruiting
Phone counseling after sleeve gastrectomy for better health
This study tests whether phone counseling can help you eat better, stay active, and take your medications as prescribed after sleeve gastrectomy weight-loss surgery. If you qualify, you will receive regular calls from a counselor to support your recovery.
Adana, YüreğirAges 18–65
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Common questions
- Are there clinical trials for bariatric surgery?
- Yes. Clin2 currently lists 237 recruiting bariatric surgery studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a bariatric surgery trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a bariatric surgery trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.