Clinical trials
Bariatric Surgery clinical trials
Below are recruiting bariatric surgery clinical trials, each written for real people, not researchers. We’re tracking 243 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT03472157Recruiting
Bariatric surgery for severe NASH with advanced liver scarring
This study tests whether bariatric surgery (either sleeve gastrectomy or Roux-en-Y gastric bypass) improves severe nonalcoholic steatohepatitis (NASH) with advanced liver scarring in people who are obese. You may also need liver biopsies to confirm your liver disease before and after treatment.
LilleAges 18–65 - NCT05363059Recruiting
Bariatric surgery compared with standard treatment for metabolic syndrome
This trial compares bariatric (weight-loss) surgery with medical (non-surgery) treatment in people with metabolic syndrome, a cluster of risk factors that can affect heart and blood sugar. It aims to see which approach improves these health risks and overall metabolism.
Chongqing, Chongqing MunicipalityAges 18–65 - NCT07268508Recruiting
Study of a gut-healthy diet after weight-loss surgery
This study tests how a special diet after weight-loss surgery affects gut bacteria, eating habits, and sense of taste and smell. Researchers want to see if this diet can improve long-term results.
LyonAges 25–65 - NCT05753124Recruiting
How weight, diabetes, and bariatric surgery affect pregnancy
This study looks at how weight, blood-sugar problems, and past weight-loss surgery affect pregnancy outcomes. You may be able to help researchers understand what to expect and how to plan care during pregnancy.
LondonAges 18–50 - NCT07324447Recruiting
Supervised exercise after bariatric surgery to protect muscles and bones
This trial is testing whether a supervised exercise program after bariatric surgery helps protect your muscle mass and bone density. It is for people who are eligible for gastric bypass or sleeve surgery and can commit to an exercise routine near Seville.
Seville, SevillaAges 18 years+ - NCT04581447RecruitingPhase 3
Metformin to help prevent diabetes returning after weight surgery
This Phase 3 study tests whether adding metformin after gastric bypass or sleeve surgery can help you stay free of diabetes for longer. It compares metformin plus standard care versus standard care alone.
AmiensAges 18–70 - NCT06874309Recruiting
Brain stimulation before weight-loss surgery for better eating control
This trial tests if gentle electrical brain stimulation (called tDCS) before weight-loss surgery can help you gain better control over your eating habits. It's designed for people with severe obesity who struggle with overeating.
Brno, CzechiaAges 18–65 - NCT06059651Recruiting
Bariatric Surgery and its Effects on Fat, Immune Cells, and Cancer
This study looks at how bariatric (weight-loss) surgery affects fat metabolism, immune cells, and cancer risk in women with severe obesity and high cholesterol. If you are a woman aged 35–60, White or Black, with a BMI of 40 or higher and high triglycerides or LDL, you may be eligible.
Baton Rouge, LouisianaAges 35–60 - NCT06222151Recruiting
Recovering from weight-loss surgery with early walking
This study tests whether starting a supervised walking program soon after weight-loss surgery helps you recover faster. It aims to see if early movement improves your recovery and hospital stay.
Esbjerg, Region SyddanmarkAges 18–70 - NCT06065124Recruiting
Study on weight loss surgery for heart failure with irregular heartbeat
This trial tests if weight loss surgery can help people with heart failure and atrial fibrillation (an irregular heartbeat) improve their heart condition. You may join if you are between 45 and 70, have a BMI of 32 to 40, and have mild to moderate heart failure with preserved pumping function.
Arnhem, GelderlandAges 45–70 - NCT06309238Recruiting
Intensive diet vs. surgery for severe obesity
This study compares two programs for people with severe obesity: an intensive weight-loss diet and a weight-loss surgery (bariatric surgery). It aims to see which approach works better for long-term health.
AarhusAges 18–60 - NCT06680492Recruiting
Nutrition and muscle health after weight loss surgery
This study looks at how nutrition affects muscle strength and function in people who have bariatric surgery. It may help you understand how to keep your muscles healthy after surgery.
Montreal, QuebecAges 18–65 - NCT05551559Enrolling by invitation
How bariatric surgery changes liver metabolism in fatty liver disease
This study looks at how bariatric (weight-loss) surgery affects how your liver processes nutrients in people with non-alcoholic fatty liver disease. It may help researchers understand what changes in the body after surgery and whether that could guide better future care.
HelsinkiAges 18–75 - NCT06575738RecruitingPhase 1
Semaglutide for teens after weight-loss surgery
This study looks at how teenagers and young adults respond to weight-loss surgery (sleeve gastrectomy) and whether adding a medication called semaglutide can help improve weight loss. It has two parts: first observing how surgery affects you, then testing if semaglutide helps those who didn't lose enough weight after surgery.
Aurora, ColoradoAges 12–24 - NCT07229924Recruiting
Cognitive improvement after weight-loss surgery with virtual reality
This trial tests whether a virtual reality exercise program can help improve thinking skills (like memory and attention) after bariatric (weight-loss) surgery. It may benefit people with severe obesity who are planning to have surgery.
Montreal, QuebecAges 18–65 - NCT03875625Recruiting
Tracking body fat and liver fat after weight-loss treatment
This study looks at how body fat and liver fat change after bariatric (weight-loss) surgery or a lifestyle program. You may join if you have overweight or obesity and can safely have MRI scans, so researchers can compare results between treatment approaches.
Hong Kong, ShatinAges 18–65 - NCT07131605Recruiting
How weight-loss surgery affects heart health and inflammation
This study looks at how weight-loss surgery affects heart health by checking markers of inflammation in the blood and how blood vessels work. It may help understand why surgery lowers heart risk for people with obesity.
Cotignola, RavennaAges 18 years+ - NCT07178704Recruiting
Genes and metabolism after weight loss surgery
This study looks at how your genes and metabolism affect changes in body composition after weight loss surgery. It aims to understand why some people lose more weight or gain muscle differently than others.
Galveston, TexasAges 18–65 - NCT06925997RecruitingEarly Phase 1
Bile acids after gastric bypass: metabolic effects study
This trial looks at how bile acids affect metabolism in people who have had gastric bypass surgery. It compares three groups: those who had diabetes before surgery, those without diabetes, and those with type 2 diabetes.
HvidovreAges 18 years+ - NCT04494048Recruiting
Registry for people considering endoscopic weight-loss procedures
This study keeps a record of people who are planning or recently had an endoscopic (camera-based) weight-loss procedure. The goal is to learn how these procedures work in real life and help doctors improve care.
New York, New YorkAges 18–89 - NCT03467581Recruiting
Five-year follow-up after laparoscopic stomach sleeve surgery
This study looks at how people do over the next five years after getting laparoscopic (keyhole) gastric sleeve surgery for obesity. It may help doctors understand long-term outcomes and benefits for future patients.
TartuAges 18–65 - NCT07453186Recruiting
Ultrasound scans before weight loss surgery
This trial tests if two types of ultrasound scans can help see the gallbladder and liver better in people scheduled for weight loss surgery. It may lead to safer procedures.
EsbjergAges 18 years+ - NCT07747779Recruiting
Comparing two weight-loss surgeries for very high body weight
This study compares two types of weight-loss surgery to see how they affect hormones after a meal. It may help you choose a surgery that improves your health and weight loss.
Pathum Wan, BangkokAges 18–60 - NCT04851470Recruiting
Dental gum check in adults with obesity
This study looks at gum health in adults with obesity. It may help researchers understand how weight and related health factors affect periodontal (gum) status and what to monitor in bariatric care populations.
LondonAges 18 years+
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Common questions
- Are there clinical trials for bariatric surgery?
- Yes. Clin2 currently lists 243 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.