Clinical trials
Obesity clinical trials
Excess body weight that increases the risk of many other health conditions. We’re tracking 1,501 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT04442334Recruiting
European registry for people with fatty liver
This registry collects health and lifestyle information from adults with suspected or confirmed fatty liver (NAFLD) to help researchers better understand the condition. You may be asked about diet, exercise, alcohol intake, and some liver-related tests.
AntwerpAges 18–100 - NCT04453072Recruiting
iPhone weight-loss app for teens and young adults after transplant
This study tests whether an iPhone weight-management app can help adolescents and young adults lose weight after a stem cell transplant. If you qualify, you’ll use the app and the team will track changes in weight.
Los Angeles, CaliforniaAges 13–30 - 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 - NCT04526743Recruiting
Eating habits and weight changes after weight-loss surgery
This study looks at how eating behaviors change over time after bariatric (weight-loss) surgery. It may help researchers understand why some people lose more weight than others and how to improve support after surgery.
BarcelonaAges 18–70 - NCT04529889Recruiting
Study of gestational diabetes during pregnancy and child outcomes
This study follows pregnant people with gestational diabetes to see how it affects mothers and babies over time. The team may use this information to better understand risks and care for both you and your child.
Guangzhou, GuangdongAges Any age - NCT04551482RecruitingPhase 2
Oxytocin to help teens lose weight
This study tests whether the hormone oxytocin can help adolescents with obesity lose weight. You may be asked to stay on your usual diet and routines during the 18-week study to see how well the treatment works.
Boston, MassachusettsAges 10–18 - NCT04583514Recruiting
Overfeeding study to see how body fat can expand
This trial studies how your body’s fat tissue changes when you eat extra food for 8 weeks. It may help researchers understand why some people gain more weight than others.
Baton Rouge, LouisianaAges 18–42 - NCT04583150Recruiting
Study of fertility and ovarian reserve after weight-loss surgery
This study looks at how ovarian reserve (a fertility-related marker) changes in women after bariatric (weight-loss) surgery versus women with obesity who are not planning surgery. It may help doctors better understand fertility timing and risks around weight-loss treatment.
AngersAges 18–37 - 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+ - NCT04657367Recruiting
Diabetes and prediabetes health tracking registry study
This study is a registry that collects information from people with diabetes, prediabetes, or normal blood sugar to better understand these conditions over time. It may help researchers learn which factors are linked to health changes, including future diabetes risk.
Bialystok, Podlaskie VoivodeshipAges Any age - NCT04735835Recruiting
Personalized diet testing using ZOE app and blood samples
This trial studies how different food compositions affect your body, using the ZOE testing program plus meals you eat and blood samples you collect. It may help you learn more about what foods work best for you, especially if you have a long-term health condition.
Needham, MassachusettsAges 18 years+ - NCT04752293Recruiting
Study of a kidney blood-pressure system in kids
This study looks at how a kidney-related blood-pressure system works in children and teenagers, comparing those with newly diagnosed primary (no known cause) high blood pressure to those with normal blood pressure. It may help doctors better understand childhood blood-pressure changes and guide future care.
Winston-Salem, North CarolinaAges 7–18 - NCT04755062Recruiting
Native-focused plant diet study for adults with BMI over 24
This trial tests whether a culturally relevant, plant-rich, micronutrient-dense diet can improve health for Native American adults. It may help with weight-related goals, but it requires weekly group coaching and specific medical and workplace criteria.
Flagstaff, ArizonaAges 18 years+ - NCT04791371Recruiting
Study how fitness and insulin resistance relate to diabetes
This study looks at how low physical activity, insulin resistance in small blood vessels, and cardiorespiratory fitness connect to diabetes and blood sugar control. You may be eligible if you are generally sedentary and fit within the weight range, and if you do not have certain heart, lung, nerve, or medication factors.
Aurora, ColoradoAges 30–55 - NCT04805762Recruiting
Coach program for kids with overweight or obesity
This study tests a lifestyle coaching program delivered through “Your COACH Next Door” for children. It may help with weight and healthy habits by providing support to help kids adopt healthier routines.
Maastricht, LimburgAges Up to 18 years - 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 - NCT04812314Recruiting
Study how exercise changes body fat and metabolism
This study looks at how starting exercise changes the structure and function of body fat. It may help you understand how exercise affects things like cholesterol and blood sugar, even if you’re not currently exercising regularly.
Ann Arbor, MichiganAges 18–40 - 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+ - NCT04873011RecruitingPhase 1
Quinine in overweight women to change hunger and gut hormones
This early study tests whether quinine affects hunger and digestion-related gut hormones in women who are mildly overweight. It may help researchers understand how the body controls appetite, but it is mainly to check effects and safety.
Leuven, Vlaams-BrabantAges 18–65 - 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 - NCT04907396Recruiting
Registry for adults trying to lose weight
This study is a registry that collects information from adults (18+) who are considering, currently working on, or have tried weight loss in the past. It may help researchers better understand weight-loss experiences and what strategies people use.
Birmingham, AlabamaAges 18 years+ - NCT04913064Recruiting
White button mushroom supplement for inflammation in high-risk breast cancer
This trial tests whether a white button mushroom powder supplement can lower inflammation in postmenopausal women who have a high risk of breast cancer. If it helps, it could improve early prevention strategies for people at higher risk.
Duarte, CaliforniaAges 21 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+ - NCT06325722Recruiting
Low fat vs. low carb diet order and body fat change
This study compares how the order of low fat versus low carb diets affects body fat changes. It may help you understand which diet sequence works best for weight loss.
Bethesda, MarylandAges 18–50
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Common questions
- Are there clinical trials for obesity?
- Yes. Clin2 currently lists 1,501 recruiting obesity 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 obesity 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 obesity 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.