Clinical trials
Gastric Bypass Surgery clinical trials
Below are recruiting gastric bypass surgery clinical trials, each written for real people, not researchers. We’re tracking 52 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06621979Recruiting
Study of fundoplicature after omega gastric bypass
This study checks if a second surgery to wrap the top of the stomach (fundoplicature) works well for people who had severe heartburn after a specific type of gastric bypass. If you had this second surgery in the last 2 years and your heartburn is better, you may be eligible.
CornebarrieuAges 18 years+ - NCT06468865Recruiting
Glucose monitoring for low blood sugar after gastric bypass
This trial tests whether a new way of using glucose monitoring can help manage low blood sugar that happens after meals in people who have had gastric bypass surgery. It aims to find better ways to track and treat these episodes.
Tønsberg, VestfoldAges 18 years+ - NCT07238309Recruiting
Comparing two ways to reinforce stomach stapling during gastric bypass
This trial tests two methods—oversewing stitches versus surgical clips—to lower the chance of bleeding after a type of gastric bypass surgery called one anastomosis gastric bypass. If you qualify, you may help find the safest technique.
Cairo, Cairo GovernorateAges 18–80 - NCT05838300Recruiting
Compare special air flow methods during gastric bypass surgery
This trial compares two ways of delivering and removing carbon dioxide gas during minimally invasive gastric bypass and related hiatal hernia repair surgery. It looks at whether one method is safer or more comfortable by changing how the gas is warmed, humidified, and controlled.
Houston, TexasAges 18–65 - NCT05325736Recruiting
Study how bariatric surgery changes blood sugar response
This study looks at how blood sugar responds after bariatric surgery (or related surgery) and whether changes can be measured over time. It may help doctors better understand which people respond best after surgery.
RehovotAges 18–70 - NCT04812132Recruiting
Compare two types of weight-loss stomach surgery
This study compares two surgical methods used for weight loss: OAGB and a longer-limb Roux gastric bypass. It may help find which option works best for people with severe obesity and obesity-related health problems.
TartuAges 18–60 - NCT04894838Recruiting
Testing a bypass revision surgery for weight regain
This study looks at whether a specific stomach bypass revision (a “distal gastric bypass”) can improve outcomes after Roux-en-Y gastric bypass when weight loss was not enough or weight was regained. You may be considered if you meet weight-loss goals criteria and can join follow-up and possibly surgery.
Arnhem, GelderlandAges 18–65 - 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 - NCT05640947Recruiting
Procedure to reverse bypass using an endoscopic stent
This trial studies a minimally invasive procedure that uses a stent placed through an endoscope to create a new connection in the stomach, with the goal of reversing a Roux-en-y gastric bypass. It may help people whose bypass has led to nutrition problems, severe dumping symptoms, difficult marginal ulcers, or liver scarring that worsens after surgery.
BrugesAges 18 years+ - NCT06291766Recruiting
Gestational diabetes after gastric bypass study
This study looks at how a continuous glucose monitor (CGM) can help manage blood sugar in pregnant women who have had gastric bypass surgery and now have gestational diabetes. It aims to find better ways to monitor and treat diabetes during pregnancy for women after this type of weight-loss surgery.
LundAges 18–50 - NCT06756789Recruiting
Comparing standard vs. tailored limb lengths in gastric bypass
This study compares two different ways of measuring the length of the small intestine during a type of weight loss surgery called gastric bypass. If you are eligible, you may help determine which approach leads to better weight loss results.
Coimbatore, Tamil NaduAges 18–65 - NCT06868992Recruiting
Study of MASH and cell changes in weight-loss surgery
This study looks at a possible link between MASH (liver inflammation with fat buildup) and tiny cell structures that help liver cells work. Researchers want to understand this better in people having weight-loss surgery, where a small liver sample will be taken.
Lyon, FranceAges 18–99 - 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+ - NCT07278115Recruiting
Gastric bypass with or without nerve-cutting for diabetes
This study compares two types of surgery for people with type 2 diabetes who also have obesity: gastric bypass alone versus gastric bypass plus a procedure called truncal vagotomy (cutting a nerve to the stomach). It aims to see which approach leads to better diabetes remission.
Athens, AtticaAges 18–68 - NCT01945840Recruiting
Study how gut hormones change after weight-loss surgery
This study looks at how gut hormones and blood sugar control change after Roux-en-Y gastric bypass. It may help researchers understand what supports healthier glucose levels after bariatric surgery.
London, Greater LondonAges 18–70 - NCT02823665RecruitingEarly Phase 1
Compare how bariatric surgery affects blood sugar changes
This early trial studies how blood sugar moves in people after certain weight-loss surgery compared with people without surgery. It may help researchers understand why blood sugar can drop too low and how treatments like atropine affect that process.
San Antonio, TexasAges 18–65 - NCT02939664Enrolling by invitation
Laparoscopic gastric bypass vs banding for weight loss
This trial compares two types of minimally invasive weight-loss surgery: gastric bypass versus a gastric band. It looks at which approach works better and is safer for people who qualify for bariatric surgery and have not succeeded with supervised weight-loss programs.
Majadahonda, MadridAges 18–65 - NCT07461610Recruiting
Stool analysis after sleeve gastrectomy vs gastric bypass
This trial compares changes in stool after two common weight-loss surgeries: sleeve gastrectomy and gastric bypass. It aims to understand how these surgeries affect digestion and gut health.
Cairo, Al-Manial CairoAges 18–60 - NCT06853652Recruiting
Protein needs after weight-loss surgery
This study looks at how much protein you need after Roux-en-Y gastric bypass (RYGB) surgery. It will help find the right amount of protein to keep your body healthy after weight-loss surgery.
LeuvenAges 18–65 - NCT06951893Recruiting
Predicting quality of life after weight-loss surgery
This study looks at whether certain traits before weight-loss surgery can predict how a person's quality of life will change afterward. It aims to find patterns that could help doctors and patients make better decisions about treatment.
Chambéry, SavoieAges 18 years+ - NCT03821636Recruiting
Compare gastric bypass limb lengths for type 2 diabetes remission
This study looks at whether a gastric bypass surgery with a longer intestine segment or a longer bile drainage segment leads to better type 2 diabetes remission in people with severe obesity. It may help doctors choose the most effective surgical approach and follow-up plan for diabetes improvement.
AmiensAges 18–60 - NCT05015283Recruiting
Gastric bypass type surgery to help type 2 diabetes go into remission
This study compares two kinds of weight-loss surgeries to see which helps people with type 2 diabetes reach diabetes remission more safely. It may help if your diabetes is not well controlled and your care team recommends one of these operations.
Beijing, Beijing MunicipalityAges 18–65 - 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 - NCT01984762Recruiting
Weight-loss surgery for type 2 diabetes
This study tests whether two weight-loss operations (sleeve gastrectomy or Roux-en-Y gastric bypass) can improve type 2 diabetes. It may help people with higher body weight and diabetes control, but it also requires meeting safety and health criteria.
GothenburgAges 18–60
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Common questions
- Are there clinical trials for gastric bypass surgery?
- Yes. Clin2 currently lists 52 recruiting gastric bypass 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 gastric bypass 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 gastric bypass 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.