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 50 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07809425Recruiting
Pain relief options for gastric bypass surgery
This study compares two ways to manage pain after gastric bypass surgery: a nerve block alone versus a nerve block plus a lidocaine drip. The goal is to see which approach provides better pain relief and fewer side effects.
AlexandriaAges 18–60 - NCT00992901RecruitingEarly Phase 1
Testing hormones and nerve signals after gastric bypass
This early-phase study looks at how the body’s hormone signals and nerve control affect insulin release after gastric bypass surgery. It may help researchers understand what drives low blood sugar and how to better monitor or treat it.
San Antonio, TexasAges 18–65 - NCT06015620Recruiting
Health changes after mini gastric bypass surgery
This study looks at how mini gastric bypass surgery helps with obesity-related health problems and changes in body composition. It aims to see if patients experience improvements in conditions like diabetes or high blood pressure.
Bhubaneswar, OdishaAges 18–65 - NCT07436013Recruiting
Comparing two types of weight-loss revision surgery after sleeve gastrectomy
This trial compares two surgical options for people who have regained weight or didn't lose enough after a sleeve gastrectomy. It tests whether adding a ring to the standard revision surgery helps with long-term weight loss.
Alexandria, Alexandria GovernorateAges 18–65 - NCT07872397Recruiting
Comparing blood sugar control after two weight-loss surgeries
This study compares how well two types of weight-loss surgery control blood sugar levels over time. It may help people with severe obesity understand which surgery could lead to more stable blood sugar after the procedure.
Seville, SevillaAges 18–74 - 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 - NCT07600411Recruiting
Weight-loss surgery and mood: comparing two surgical approaches
This study follows patients undergoing one of two common weight-loss surgeries (sleeve gastrectomy or gastric bypass) to see how each affects binge eating, depression, and anxiety. Researchers want to understand which surgery may help improve both weight and mental health outcomes.
Cairo, Al-Manial CairoAges 18–60 - NCT06057597Recruiting
Comparing two types of gastric bypass surgery for weight loss
This trial compares a new version of gastric bypass (with a longer 150cm bypassed segment) to the standard Roux-en-Y gastric bypass to see which leads to better weight loss and health improvements. It is for people with severe obesity who are already scheduled for surgery and want to help find the best procedure.
ParisAges 18–65 - NCT07158008Recruiting
Weight loss surgery for people with obesity and heartburn
This study compares two weight-loss surgeries for people who have both obesity and severe heartburn or GERD. One surgery combines part of the stomach removal with an anti-reflux wrap, while the other reroutes the stomach to help with weight loss and reflux.
KrakowAges 18–65 - NCT06829381Recruiting
Personalized one-anastomosis gastric bypass trial
This trial studies a personalized version of a common weight-loss surgery called One Anastomosis Gastric Bypass (OAGB). It aims to see if tailoring the surgery to each person improves results and safety.
Tel AvivAges 18 years+ - NCT01803451RecruitingEarly Phase 1
Tested after gastric bypass for low blood sugar
This early study looks at a gut hormone–based treatment (GLP-1) and how it affects blood sugar and digestion after gastric bypass. It may help people who are having repeated low blood sugar episodes after surgery.
San Antonio, TexasAges 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+ - NCT07565051Recruiting
Predicting weight loss after gastric bypass surgery
This study looks at whether measuring muscle mass before gastric bypass surgery can predict how much weight you'll lose afterward. Understanding this connection may help doctors better prepare patients for surgery and set realistic goals.
Geneva, Canton of GenevaAges Any age - NCT03407833Enrolling by invitation
Study changes in the body after weight, gut, or liver treatment
This study looks at how the body’s insulin-sensitivity (how well your body uses sugar/insulin) and organ function change after certain medical procedures. It may help researchers understand why some people improve after surgery or liver transplant and guide future care.
Nashville, TennesseeAges 18 years+ - NCT04930029Recruiting
Long-term follow-up after gastric bypass with an omega limb
This study looks at long-term side effects years after gastric bypass surgery done in a specific way. If you had this type of surgery and agree to an endoscopy with small tissue samples at 10 years, you may help doctors understand longer-term outcomes.
LilleAges 18 years+ - NCT06293703Recruiting
Leg length ratio and weight loss after gastric bypass
This study looks at how the length of different parts of your small intestine affects weight loss after Roux-en-Y gastric bypass surgery. It may help doctors tailor the surgery for better results.
Cleveland, OhioAges 18–70 - 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+ - 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 - NCT06789965Recruiting
Comparing two weight loss surgeries for severe obesity
This trial compares two different surgical techniques for people with severe obesity (BMI 40-50) to see which works better. It is for those who are good candidates for bariatric (weight loss) surgery.
Barcelona, BarcelonaAges 18–60 - 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 - NCT07446972Recruiting
Bariatric surgery and female sexual health study
This study looks at how weight-loss surgery (bariatric surgery) affects a woman's sexual function and hormone levels. It follows women who are already scheduled for surgery to see if their sexual health changes after the procedure.
Cairo, Al-Manial CairoAges 18–45 - NCT07796503Recruiting
Comparing two ways to measure the bypass in weight-loss surgery
This study compares two methods for choosing the length of the intestinal bypass in a weight-loss surgery called one-anastomosis gastric bypass. It may help improve weight loss and reduce complications.
AlmatyAges 18–65 - NCT06752018Recruiting
Inflammation, heart disease, and diabetes study
This study looks at how inflammation affects heart disease and diabetes. It may help find new ways to prevent or treat these conditions.
AarhusAges 18 years+ - NCT07148492Recruiting
Stitch to prevent reflux after gastric bypass
This trial tests adding an antireflux stitch to a type of gastric bypass surgery to see if it helps reduce acid reflux. It may help patients who are already scheduled for this surgery.
Peshawar, KhyberpukhtunkhwaAges Any age
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Common questions
- Are there clinical trials for gastric bypass surgery?
- Yes. Clin2 currently lists 50 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.