Clinical trials
Bariatric Surgery Candidate clinical trials
Below are recruiting bariatric surgery candidate clinical trials, each written for real people, not researchers. We’re tracking 69 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06850493Recruiting
Ketogenic Diet Before Weight-Loss Surgery
This study tests whether following a ketogenic diet (a low-carb, high-fat eating plan) before weight loss surgery can improve your health and recovery. You will be asked to follow the diet for a few weeks before your scheduled Roux-en-Y gastric bypass.
Veldhoven, North BrabantAges 18–65 - NCT05695040Recruiting
Diet workshop after bariatric surgery
This study tests whether a structured diet workshop, held about 15 days after bariatric (weight-loss) surgery, helps patients with their post-surgery eating plans. You may be invited to join the workshop if you are scheduled for surgery and can attend as required.
Clermont-FerrandAges 18 years+ - NCT05531474Recruiting
Bariatric surgery to lower future heart and stroke events
This trial looks at whether weight-loss surgery can reduce the chances of heart attack, stroke, or other serious heart problems in people at higher heart risk. You might be offered surgery and followed over time to see if cardiovascular events are reduced.
Hamilton, OntarioAges 18 years+ - NCT06464822Recruiting
Effects of weight-loss surgery on urinary symptoms
This study looks at whether weight-loss surgery can improve urinary symptoms like needing to pee often or suddenly. It is for people with severe obesity who are already being seen at a specific clinic for bariatric surgery.
Hong KongAges 18 years+ - 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 - NCT07569705Recruiting
Nerve Stimulation to Help Breathing After Weight-Loss Surgery
This trial tests whether electrical nerve stimulation (a non-invasive, pain-relieving technique) can help improve breathing problems that sometimes occur after weight-loss surgery. The study measures how well your diaphragm—the muscle that helps you breathe—works after the procedure.
CairoAges 20–60 - NCT07104825Recruiting
Nerve block for pain after weight loss surgery
This trial tests if a nerve block can help control pain after gastric bypass or sleeve gastrectomy. The goal is to reduce the need for strong pain medicines and improve recovery.
Evanston, IllinoisAges 18–90 - NCT03517072Recruiting
Study of long-term success after bariatric surgery
This study looks at what helps people do well in the long run after bariatric (weight-loss) surgery. You may be able to join if you had the surgery about five years ago and are willing to participate.
ArrasAges Any age - NCT04008563Recruiting
Weight-loss surgery to protect fertility in early womb cancer
This study tests whether bariatric (weight-loss) surgery can help treat certain early, low-grade womb changes while preserving fertility. It’s mainly for people with a higher BMI who want to have children and have an early stage diagnosis confirmed by scans.
Toronto, OntarioAges 18–41 - NCT04040413Recruiting
Database update for bariatric weight-loss surgery
This trial is a “database maintenance” study related to bariatric (weight-loss) surgery. It helps keep the records up to date and may support future care by organizing information about patients who get surgery.
Ramat GanAges Any age - NCT04366999Recruiting
Bariatric surgery for fatty liver disease in people with obesity
This trial looks at whether weight-loss (bariatric) surgery helps people with fatty liver disease, including “NASH,” and related liver scarring. If you have obesity and a confirmed liver fat diagnosis (and for NASH, biopsy-proven NASH with some fibrosis), the study may follow your outcomes after surgery.
Beijing, Beijing MunicipalityAges 16–65 - 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 - NCT04590690Recruiting
Gut microbes and sex risks for kidney stones after weight surgery
This study looks at how gut bacteria (microbes), along with sex, may affect the chance of getting kidney stones after bariatric (weight-loss) surgery. It may help doctors understand who is at higher risk so prevention can be improved.
Chicago, IllinoisAges 18–130 - NCT04766801Recruiting
Survey for teens seeking weight-loss surgery
This study is a health and survey project for teenagers who are considering bariatric (weight-loss) surgery. It aims to better understand the teen experience and support needs before surgery.
Angers, Maine Et LoireAges 14–20 - 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+ - 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 - 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 - NCT05000996Recruiting
Gut microbiome study for people having metabolic surgery
This study looks at your gut bacteria (your “microbiome”) around the time of metabolic surgery. It may help researchers understand how surgery affects gut health and related conditions like diabetes, blood pressure, and cholesterol.
Nashville, TennesseeAges 21–65 - NCT05235945Recruiting
Exercise program for people waiting for weight-loss surgery
This trial studies whether an exercise program can help people prepare for bariatric (weight-loss) surgery. It aims to see if exercise is safe and beneficial while you’re waiting for your surgery date.
LondonAges 18 years+ - 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 - NCT05859022Recruiting
Bariatric treatment methods compared for diabetes and metabolism
This trial compares a less invasive heart/artery-based bariatric treatment (bariatric arterial embolization) with standard weight-loss surgery to see how they affect metabolism and type 2 diabetes. You might be considered if you have obesity with type 2 diabetes and have not had prior bariatric surgery.
LisbonAges 18–75 - 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 - 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+ - NCT06198790Recruiting
Anemia after weight loss surgery
This study looks at how common anemia is after weight loss surgery. It follows people who have sleeve gastrectomy or gastric bypass to see if they develop anemia.
BeijingAges 16–70
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Bariatric Surgery Candidate trials by city
Studies with a site in or near these metro areas.
Bariatric Surgery Candidate trials by state
Studies with a site anywhere in these states.
Common questions
- Are there clinical trials for bariatric surgery candidate?
- Yes. Clin2 currently lists 69 recruiting bariatric surgery candidate 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 candidate 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 candidate 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.