Clinical trials
Bariatric Surgery clinical trials
Below are recruiting bariatric surgery clinical trials, each written for real people, not researchers. We’re tracking 238 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT02024542Recruiting
How the body changes after bariatric surgery
This study looks at how metabolism (how your body handles food and energy) responds after weight-loss surgery. It may help researchers understand what changes to expect in people with diabetes or prediabetes and cholesterol problems.
Sacramento, CaliforniaAges 18–55 - NCT04942093Recruiting
High-protein low-calorie diet before weight-loss surgery
This trial studies whether a higher-protein, lower-calorie diet before sleeve gastrectomy (a type of weight-loss surgery) changes outcomes after surgery. You may be able to join if you’re scheduled for the operation and meet specific health and safety requirements.
DieppeAges 18–65 - NCT06168162Recruiting
Personalized breathing support during weight-loss surgery
This trial tests whether a personalized breathing setting during surgery can lower the risk of lung complications after weight-loss surgery. If you have a high risk of lung issues, you may be eligible.
Cairo, Cairo GovernorateAges 16 years+ - NCT07423780Recruiting
Exercise after weight-loss surgery
This study tests a supervised exercise program for people who recently had weight-loss surgery (sleeve gastrectomy or gastric bypass). It aims to help improve physical fitness and recovery after surgery.
Santiago, Santiago MetropolitanAges 18–60 - NCT07273955Recruiting
Alcohol use and weight-loss surgery: a study of addiction follow-up
This study looks at how alcohol use disorder changes after weight-loss surgery. Researchers want to understand the link between eating disorders, alcohol problems, and addiction treatment before and after surgery.
StrasbourgAges 18 years+ - NCT06372015Recruiting
Diet program vs bariatric surgery for liver health
This study compares two ways to help people with obesity and liver problems: a special diet program or weight-loss surgery. Researchers will look at changes in fats, immune system, and genetic markers to see which approach works better.
Castellana Grotte, BariAges 18 years+ - NCT04136717Recruiting
Test if FreeO2 helps keep oxygen levels in range
This study looks at whether adding FreeO2 can help keep your oxygen saturation (a measure of oxygen in the blood) within a target range while you use breathing support like NIV or CPAP. It may help reduce time spent either too low or too high in oxygen levels.
Québec, QuebecAges 18 years+ - NCT07685483Recruiting
Drama therapy for well-being in obesity and weight-loss care
This trial tests whether drama therapy can improve psychological and social well-being for people with obesity or those in bariatric care. It compares drama therapy sessions with standard care to see if it helps with emotional health and social connections.
Blendecques, Hauts-de-FranceAges 18 years+ - NCT05608772Recruiting
Revision weight-loss surgery after failed sleeve
This study looks at which revision surgery works best after a prior sleeve stomach operation that didn’t last. It tests switching to one of three procedures to help with weight regain, and it excludes more severe acid reflux cases.
Alexandria, Alexandria GovernorateAges 18–60 - NCT06426290Recruiting
Predicting success after weight-loss surgery
This study looks at whether a psychological test can help predict who will do well after weight-loss surgery. Researchers are reviewing past test results and surgery outcomes to find patterns.
MoulinsAges 18 years+ - NCT07118540Recruiting
Weight-loss surgery follow-up after 5 years
This trial is checking how well patients are cared for after weight-loss surgery, focusing on those who stopped coming to check-ups 5 years after their operation. If you were part of the OBESEPI study and haven't been seen recently, this research wants to understand your experience.
Nancy, LorraineAges 18–65 - NCT01477957Recruiting
Bariatric surgery and changes in insulin and body energy use
This study tests whether weight-loss surgery improves how your body uses insulin and energy. It compares insulin sensitivity and related measurements before and after surgery to understand who benefits.
Düsseldorf, North Rhine-WestphaliaAges 20–70 - NCT07059104Recruiting
Breast reconstruction after weight loss surgery study
This study looks at how breast reconstruction with implants works for women who have had major weight loss surgery. It uses national health registries to track outcomes and help doctors and patients make better choices.
GothenburgAges Any age - NCT03535142Recruiting
Fatty liver in people considering bariatric surgery
This study looks at how fatty liver disease may predict future liver health in people with severe weight gain. It compares people who are planning bariatric (weight-loss) surgery with similar people who are not, to better understand who may be at higher risk.
EsbjergAges 18 years+ - NCT02390973Recruiting
Bariatric-style surgery vs best diabetes care for long remission
This trial compares surgery plus follow-up care versus the best non-surgical (medical) treatment to help people keep type 2 diabetes in remission for a long time. It may be an option if you have higher body weight and diabetes that’s not well controlled, but safety checks are strict.
Québec, QuebecAges 18–60 - NCT07822763Recruiting
Carbohydrate drink before weight-loss surgery for faster recovery
This study tests whether drinking a special carbohydrate drink before weight-loss surgery can help your stomach and intestines recover faster after the operation. If you have metabolic syndrome and are planning certain types of bariatric surgery, this may help you improve your recovery.
Chongqing, Chongqing MunicipalityAges 18–65 - NCT02811900Recruiting
Study of outcomes after weight-loss (bariatric) surgery
This study follows adults who have bariatric (weight-loss) surgery to see what outcomes they experience afterward. It may help doctors better understand how well the surgery works in real life.
StrasbourgAges 18 years+ - NCT05211375RecruitingPhase 3
Compare two weight-loss surgeries for type 2 diabetes control
This Phase 3 trial compares sleeve gastrectomy versus a different bypass-style operation to improve blood sugar in adults with type 2 diabetes. It may help some people lower blood sugar and diabetes medication needs, but you must meet specific safety and health criteria.
Seongnam-siAges 18 years+ - NCT05330910Recruiting
Repair of a stomach valve during sleeve weight-loss surgery
This trial tests whether doing a specific repair near the stomach valve (the gastroesophageal junction) during laparoscopic sleeve gastrectomy can help people with a loose valve. It is aimed at adults who have a particular endoscopy finding (Hill grade III) and choose this weight-loss surgery.
SingaporeAges 21–65 - NCT05472922Recruiting
Small stomach bypass surgery for weight loss
This trial compares a “mini” gastric bypass procedure to help with weight loss in adults who qualify for bariatric (weight-loss) surgery. It’s testing whether the approach works well and is safe for people who meet the study requirements.
AlmeloAges 18 years+ - NCT03460314Recruiting
Testing buprenorphine absorption around stomach weight-loss surgery
This study checks how well buprenorphine (a medicine used for opioid dependence and pain in some cases) works in the body after gastric bypass or sleeve gastrectomy. It may help doctors better plan dosing and timing around weight-loss surgery.
TrondheimAges 18–70 - NCT03460379Recruiting
Bariatric surgery and how escitalopram is absorbed
This study looks at how a common antidepressant, escitalopram, moves through your body before and after gastric bypass or sleeve gastrectomy. Results may help doctors better choose dosing for people taking this medication around the time of weight-loss surgery.
TrondheimAges 18–70 - NCT02169518Recruiting
Testing blood fat markers in diabetes and heart health
This study measures how certain blood “fat” markers relate to blood sugar control and inflammation. It may help researchers understand risk factors for heart disease in people with type 1 or type 2 diabetes, pre-diabetes, and people preparing for weight-loss surgery.
Manchester, LancashireAges 20–75 - NCT03842475Recruiting
Who may benefit from weight-loss surgery for diabetes?
This study looks at which people with type 2 diabetes (or prediabetes) are most likely to benefit from bariatric surgery. It compares people who are planning surgery with healthy volunteers to better understand how body changes relate to blood sugar.
London, Greater LondonAges 18–80
Hear when a new Bariatric Surgery trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for bariatric surgery?
- Yes. Clin2 currently lists 238 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.