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
- NCT06599047Recruiting
Fat tissue study in type 2 diabetes surgery patients
This study looks at fat tissue in people with type 2 diabetes who are having abdominal surgery. It aims to understand how fat differs in people with diabetes compared to those without, which may help improve future treatments.
Montreal, QuebecAges 18–65 - NCT06914219Recruiting
Eating disorder screening after weight loss surgery
This study tests a program to screen for and treat eating disorders in people who have had weight loss surgery. It aims to find and help those struggling with eating issues after surgery.
Halifax, Nova ScotiaAges 19 years+ - NCT05005039Recruiting
Study how bariatric surgery may affect bone strength
This trial studies whether bariatric surgery (bypass or sleeve) changes bone loss in postmenopausal women with obesity. It may help doctors understand who is at higher risk for weaker bones and how to prevent it.
LilleAges 45–70 - NCT07457034Recruiting
Digital follow-up after weight loss surgery
This study tests whether a digital follow-up system with nursing education can help people who have had weight loss surgery (bariatric surgery) stay on track and improve their recovery. It is designed for adults who are cleared for exercise and comfortable using technology.
Istanbul, ÜSKÜDARAges 18–65 - NCT05315752Recruiting
Body fat changes after CPAP-treated sleep apnea improves
This study looks at how bariatric (weight-loss) surgery may change body fat and body shape in people with severe obstructive sleep apnea who use CPAP. It aims to understand what may improve when sleep apnea is better controlled after surgery.
BrusselsAges 18–99 - NCT05934409Recruiting
Measuring body-fat storage after bariatric surgery
This study looks at how body fat is stored and how that may relate to early improvements in diabetes and heart/liver health after bariatric surgery. It may help researchers understand why some people recover faster and which body changes matter.
Sherbrooke, QuebecAges 18–65 - NCT05987631Recruiting
Predicting weight loss and health after weight loss surgery
This study looks at why some people lose more weight and improve their health more than others after bariatric surgery. It also has a subgroup that specifically studies people who are insulin resistant (a sign of prediabetes) to see how surgery affects their metabolism.
Gouda, South HollandAges 18–75 - 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 - NCT05569785Recruiting
Bariatric surgery and exercise to study muscle changes
This study looks at how exercise and bariatric surgery (gastric bypass or sleeve) affect your muscle strength and health. You may be eligible if you are an adult with obesity who is planning one of these surgeries.
DerbyAges 18–70 - NCT06076187Recruiting
How older adults digest protein after weight loss surgery
This study looks at how well older adults break down protein after bariatric surgery. It compares people who had surgery one to ten years ago with those who didn't, to understand protein needs.
Leuven, Flemish BrabantAges 18 years+ - NCT06169033Recruiting
Can belly fat scans predict weight-loss surgery success?
This study looks at how fat around your belly and inside your abdomen, seen on a CT scan, can predict how well bariatric (weight-loss) surgery will work for people with type 2 diabetes.
BeijingAges 16–70 - NCT06547515Recruiting
Bone and muscle health after sleeve gastrectomy
This study looks at how sleeve gastrectomy surgery affects bone and muscle health in men and women at different life stages (before and after menopause). It compares people having the surgery with those who qualify but don't have it.
QuébecAges 18 years+ - NCT06597617Recruiting
Exercise Program After Weight Loss Surgery
This study looks at how a personalized exercise program after weight loss surgery might reduce the impact of long-lasting environmental chemicals (called persistent organic pollutants) that are stored in body fat. It may help you lose weight more safely and improve your health after surgery.
NiceAges 18–55 - NCT07223983RecruitingPhase 1
Semaglutide for alcohol use disorder after weight loss surgery
This trial tests if a once-weekly diabetes medication (semaglutide) can help people with alcohol use disorder who have had gastric bypass or sleeve gastrectomy in the past 7 years. It may reduce alcohol cravings or drinking.
New Haven, ConnecticutAges 18 years+ - NCT06043245Enrolling by invitation
Diabetes remission and weight loss surgery
This trial tests whether a specific type of weight loss surgery can help people with type 2 diabetes stop needing diabetes medication. It is for people with a very high body mass index (BMI over 45) who are currently on diabetes pills or insulin.
L'Hospitalet de Llobregat, BarcelonaAges 18–60 - NCT05166954Recruiting
Bariatric surgery and heart function in people with high blood pressure
This study looks at whether bariatric (weight-loss) surgery improves heart function in people who have high blood pressure. You may be able to join if you’re already a bariatric surgery patient at the study hospital and meet the health and medication criteria.
Beijing, Beijing MunicipalityAges 17–70 - NCT06547411Recruiting
Bariatric surgery and breathing machine settings study
This trial tests how different settings on the anesthesia machine affect people having weight-loss surgery. It aims to find the best way to manage breathing during the procedure.
Baotou, Inner MongoliaAges 16–65 - NCT06721507RecruitingPhase 4
Tirzepatide after weight loss surgery
This study tests whether giving tirzepatide (a medicine that helps with weight and blood sugar) right after weight loss surgery can improve results. It is for people who are already scheduled for sleeve gastrectomy or gastric bypass at UK HealthCare.
Lexington, KentuckyAges 18 years+ - NCT06781229Recruiting
Gum bacteria in people preparing for weight loss surgery
This trial looks at the bacteria in the mouths of people with a BMI of 30 or higher who are scheduled for weight-loss surgery. The goal is to understand how gum health and body weight are connected.
ToulouseAges 18 years+ - NCT07303543Recruiting
Protein and exercise to prevent muscle loss after weight-loss surgery
This trial tests whether taking protein-collagen supplements and doing resistance exercises can help people maintain muscle after bariatric surgery. It may be a good fit if you are between 20 and 50 years old, have a BMI of 35 or higher, and are not pregnant or in menopause.
Istanbul, FatihAges 20–50 - 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 - NCT04614961Recruiting
Obesity clinic patient database study
This study collects information about people who visit an obesity clinic. It aims to better understand patients’ health and care needs, which may improve future treatment.
LeuvenAges 18 years+ - NCT04634591Recruiting
Weight-loss surgery study for people with severe obesity
This trial studies bariatric (weight-loss) surgery and how well it helps people reach and keep a healthier weight. You may qualify if you have severe obesity and have not been able to maintain weight loss with other attempts, and if you can safely follow the study plan.
Bialystok, Podlaskie VoivodeshipAges 18 years+ - NCT07517406Recruiting
Blood sugar patterns in pregnant women after weight-loss surgery
This study looks at blood sugar measurements in pregnant women who have had weight-loss (bariatric) surgery before getting pregnant. Researchers want to find which blood sugar tests best predict gestational diabetes—a type of diabetes that develops during pregnancy—so they can catch and treat it earlier.
Istanbul, ŞişliAges 18–50
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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.