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26 Weightloss Trials

Power is an online platform that helps thousands of Weightloss patients discover FDA-reviewed trials every day. Every trial we feature meets safety and ethical standards, giving patients an easy way to discover promising new treatments in the research stage.

This randomized phase III trial studies whether weight loss in overweight and obese women may prevent breast cancer from coming back (recurrence). Previous studies have found that women who are overweight or obese when their breast cancer is found (diagnosed) have a greater risk of their breast cancer recurring, as compared to women who were thinner when their cancer was diagnosed. This study aims to test whether overweight or obese women who take part in a weight loss program after being diagnosed with breast cancer have a lower rate of cancer recurrence as compared to women who do not take part in the weight loss program. This study will help to show whether weight loss programs should be a part of breast cancer treatment.
No Placebo Group
Pivotal Trial
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Phase 3
Age:18+
Sex:Female
3177 Participants Needed
This clinical trial evaluates the use of an Episodic Future thinking Intervention to promote weight loss in breast cancer survivors. Obesity is associated with multiple negative health sequelae in breast cancer survivors. This includes an increased risk of cancer recurrence and mortality, multiple quality of life issues, and increased risk of co-morbidities. Delay Discounting is a behavioral health economic target that refers to the "discounting" of a larger benefit in the future for a smaller, more immediate reward in the present. A high delay discounting rate is correlated with poor dietary choices and sedentary lifestyle. Episodic Future Thinking (EFT) simulates positive events that may occur in one's future, engaging the science of prospection. EFT decreases delay discounting rate, resulting in healthier diet choices and weight reduction. However, valuation of the future may impact cancer survivors differently due to adjusted mortality perception and cancer-related stress. This study will determine the feasibility and preliminary efficacy of remotely delivered (smartphone application) EFT as a behavioral intervention for weight loss in breast cancer survivors. Implementation of EFT as a complementary approach to standard lifestyle interventions could lead to improvement in weight loss, food choice, and quality of life, thereby positively impacting overall health and longevity in cancer survivors.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18+
Sex:Female
50 Participants Needed
This is a Phase 2 study to evaluate the safety and efficacy of 24, 36, and 48 mg GZR18 (Q2W) compared with placebo and 15 mg tirzepatide (QW). The study will evaluate weight management in participants with obesity (BMI ≥30 kg/m2) or who are overweight (BMI ≥27 kg/m2) with weight-related comorbidities (excluding type 2 diabetes mellitus).
No Placebo Group
Trial Details
Trial Status:Not Yet Recruiting
Trial Phase:Phase 2
Age:18 - 75
Sex:All
285 Participants Needed
This trial evaluates the safety and effectiveness of the SIPS procedure, a modified weight-loss surgery. It targets patients needing bariatric surgery, including those who didn't lose enough weight from a previous surgery. The procedure helps patients feel full with less food and absorb fewer calories, promoting weight loss.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 89
Sex:All
25 Participants Needed
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LY3841136 for Obesity

Cincinnati, Ohio
This trial is testing a new medication called LY3841136 to help adults who are overweight or obese manage their weight. The study aims to see if this medication is safe and effective over several months.
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Phase 2
Age:18 - 75
Sex:All
250 Participants Needed
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LY3305677 for Obesity

Cincinnati, Ohio
This trial is testing a new medication called LY3305677 to help adults who are obese or overweight manage their weight. The study will last over a year. Researchers want to see if this medication helps people lose weight and if it is safe to use.
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Phase 2
Age:18 - 75
Sex:All
179 Participants Needed
This study is researching experimental drugs called trevogrumab and garetosmab (called "study drugs") in combination with another drug, semaglutide (Wegovy®). This study will be done in 3 parts, Part A, Part B, and Part C where different study drugs will be tested. Part A of the study is focused on healthy participants. Part B and C of the study is focused on participants with obesity. The aim of Part A of the study is to see how safe and tolerable the study drug is in healthy participants. The aim of Part B and Part C of the study is to see how safe and effective the study drug is when combined with Wegovy. Parts A, B, and C of the study are looking at several other research questions, including: * What side effects may happen from taking the study drug * How much study drug is in the blood at different times * Whether the body makes antibodies against the study drug (which could make the drug less effective or could lead to side effects)
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Phase 2
Age:18 - 80
Sex:All
999 Participants Needed
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MET097 for Diabesity

Cincinnati, Ohio
This study is designed to test how well once-weekly MET097 (an ultra-long-acting GLP-1 receptor agonist) works to treat adults with obesity or overweight and type 2 diabetes mellitus (T2DM) compared to placebo. MET097 or placebo will be administered to individuals via subcutaneous injection once weekly for 28 weeks. If an individual is randomly assigned to MET097 they will receive one of four different dose regimens.
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 2
Age:18 - 75
Sex:All
125 Participants Needed
This trial involves using a smart scale for regular weight tracking and a special blood test to detect cancer early. It targets people who lose weight without trying, aiming to find cancer sooner by combining weight monitoring with advanced blood testing.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:40 - 80
Sex:All
1000 Participants Needed
The goal of this randomized controlled trial is to compare preoperative intensive weight management to upfront surgery in obese patients undergoing complex abdominal wall reconstruction. The main question is will abdominal wall specific quality of life (using the HerQLes survey) for the group undergoing upfront surgery be non-inferior compared to the group in the weight management program.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18+
Sex:All
258 Participants Needed
This is a prospective, pragmatic, 21 month, single-center, randomized, 2-phased, open-label, parallel-group trial comparing the use of enhanced lifestyle changes (ELC) in two different sequential anti obesity medication (AOM) therapies. The ELC consists of a medically-supervised and comprehensive weight loss program (Cleveland Clinic's Department of Endocrinology, Diabetes and Metabolism's Integrated Weight Management Program). In the first phase (9 months) of the study, all participants will receive tirzepatide 15 mg (option #1) or semaglutide 2.4 mg if tirzepatide is not tolerated. In the second phase, after completing 9 months of tirzpeatide or semaglutide, participants will continue ELC and will be randomly assigned to a different oral AOM therapy for another 12 months: group 1 (phentermine-topiramate or naltrexone-bupropion) or group 2 (orlistat). The primary endpoint will be the percentage weight loss at 21 months compared to weight loss at 9 months. The goal will be to show superiority of the arm receiving ELC plus AOM therapy (phentermine-topiramate or naltrexone-bupropion) when compared to the other AOM therapy group (orlistat). Secondary and exploratory endpoints will include percentage of fat mass loss, lean muscle mass, functional capacity, muscle strength and compliance to enhanced lifestyle changes. Informed consent will be obtained. IRB approval of the study will be obtained.
No Placebo Group
Trial Details
Trial Status:Not Yet Recruiting
Trial Phase:Phase 4
Age:25 - 65
Sex:All
150 Participants Needed
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Revita DMR for Obesity

Muncie, Indiana
Fractyl is evaluating Revita Duodenal Mucosal Resurfacing (DMR) in the REMAIN-1 pivotal study, which is designed to include two cohorts - an open label cohort referred to as REVEAL-1, and a randomized cohort, which includes both a midpoint analysis and a pivotal analysis. Patients who previously lost at least 15% of their body weight on a GLP-1 can qualify for the open label REVEAL-1 cohort. The data generated from the REVEAL-1 cohort will be used for open label reporting as the study progresses. The REMAIN-1 randomized cohort will enroll patients living with obesity and a body mass index ("BMI") between 30 and 45 kg/m2 who are not currently on a GLP-1 drug. Patients will be prescribed tirzepatide and titrated to achieve at least 15% total body weight loss, at which time tirzepatide will be discontinued and patients will be randomized to Revita versus sham at 2:1. Midpoint Analysis of Randomized Cohort: The midpoint analysis of the randomized cohort will be performed at three months of follow-up on approximately 45 patients, allowing us to assess and report on safety and efficacy signals that could be anticipated in the pivotal analysis. These patients are distinct from those included in the pivotal analysis. Pivotal Analysis of Randomized Cohort: The pivotal analysis of the randomized cohort will be performed on approximately 315 patients (distinct from those included in the midpoint analysis) and will evaluate safety and efficacy in the first co-primary endpoint, which is weight regain from the time of tirzepatide discontinuation in Revita DMR versus sham patients at six months, with a primary objective of demonstrating a benefit of Revita DMR versus sham for weight maintenance after GLP-1 discontinuation. The second co-primary endpoint evaluates a responder rate among the Revita DMR treated group at one year to demonstrate the durability of the Revita DMR procedure for weight maintenance after discontinuation of a GLP-1-based therapy. Secondary objectives will include evaluation of the effectiveness of the Revita DMR procedure on the change in blood glucose levels, cardiovascular disease ("CVD") risk factors, body composition and pre-diabetes status. All patients enrolled in the study will receive diet and lifestyle counseling.
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:21 - 70
Sex:All
315 Participants Needed
This study seeks to establish the efficacy of identifying weight loss nonresponders early in a Diabetes Prevention Program (DPP) intervention in 20 community settings (primarily churches and community centers) and providing them with individual-level, enhanced treatment through telephone contacts and access to additional resources. Additionally, potential mediators and moderators of the relationship between intervention status and weight loss response at 6 months in both nonresponders and responders will be examined and a cost-effectiveness analysis to evaluate the cost of the intervention will be conducted. This study addresses key gaps in the literature about the weight loss effects of identifying nonresponders early and characterizing individuals who need more intense personalized strategies. The investigators hypothesize that changes between baseline and 3 months will be more pronounced among the nonresponders in the intervention group compared to the nonresponders in the active control group.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18+
Sex:All
403 Participants Needed
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Retatrutide for Obesity

Lexington, Kentucky
This is a study of retatrutide in participants with obesity. The main purpose is to learn more about how retatrutide maintains body weight loss. The study will have two treatment phases: an 80 week lead-in phase in which all participants will take retatrutide dose 1 and a 36 week randomized, double-blinded phase in which participants will either take retatrutide dose 1, retatrutide dose 2, or switch to placebo. Participation in the study will last around 125 weeks.
Pivotal Trial
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 3
Age:18+
Sex:All
586 Participants Needed
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Ponsegromab for Cachexia

Lexington, Kentucky
This trial tests Ponsegromab, a new drug, on cancer patients who are losing weight and have high GDF 15 levels. The drug aims to lower GDF 15 to improve appetite and reduce weight loss.
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Phase 2
Age:18+
Sex:All
187 Participants Needed
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VK2735 for Obesity

Indianapolis, Indiana
This is a phase 2, 13-week randomized, double-blind, placebo-controlled, parallel arm dose-finding study that will evaluate the safety, tolerability, weight loss efficacy, pharmacodynamic effects, and pharmacokinetics of VK2735 Oral Formulation in adults who are obese (BMI ≥30 kg/m2) or who are overweight (BMI ≥27 kg/m2) with at least one weight-related co-morbid condition. VK2735 or matched placebo will be administered once daily.
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 2
Age:18+
Sex:All
280 Participants Needed
Participants will be randomized into one of two different experimental groups: 1) Exercise group and 2) No exercise (control group). Subject participation in the study will involve a series of metabolic tests before and after participants undergo a 10% weight loss program (with or without exercise training depending on group randomization). After completing this weight loss portion of the study, participants will then be required to adhere to a high calorie diet program to regain half of the weight the participant lost - followed by the same series of metabolic tests.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 40
Sex:All
46 Participants Needed
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Exercise for Weight Loss

Ann Arbor, Michigan
Study Purpose: The combination of caloric restriction and exercise is the most common first-line treatment for obesity-related disorders, yet we know very little about how these two very different treatments work together. A deeper understanding about mechanisms underlying the health benefits of adding exercise to a weight loss program will not only aid efforts to optimize more effective lifestyle interventions, but it can also uncover novel targets for the treatment/prevention of obesity-related diseases. Although a reduction in body fat is the fundamental adaptation to weight loss, we know almost nothing about the effects that adding exercise has on structural and functional changes within fat tissue that may further enhance metabolic health. This is very important because many obesity-related metabolic health complications are tightly linked with abnormalities in abdominal fat tissue. We argue exercise-induced modifications in abdominal fat tissue will reveal persistent health benefits even if some weight is regained Study Summary: 10% Weight Loss Phase - Subject participation in the study will involve a series of metabolic tests before, at midpoint, and after undergoing a 10% weight loss program (with or without exercise training depending on group randomization). During this, subjects will be randomized into one of two different experimental groups: 1. Moderate Intensity Continuous Training (MICT) exercise group 2. No exercise (control) group Follow-up Phase: After completing the metabolic testing post-weight loss, all study-related diet and exercise supervision will end and subjects will be free to make their own choices regarding diet and exercise/physical activity behavior. Subjects will then be asked to complete follow-up testing at 2-, 4- and 6- months post-weight loss. Total involvement in the study for each subject will likely be about 10-13 months (4-7 months during weight loss phase, 6 months during follow-up phase).
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 40
Sex:All
68 Participants Needed
The PROVE Trial is a randomized clinical trial that will determine whether a weight loss intervention combined with walking exercise achieves greater improvement or less decline in six-minute walk distance at 12 month follow-up than walking exercise alone in people with PAD and BMI\>25 kg/m2. The intervention uses a Group Mediated Cognitive Behavioral framework, connective mobile technology, remote monitoring by a coach, and a calorie restricted Dietary Approaches to Stop Hypertension (DASH)-derived Optimal Macronutrient Intake Trial for Heart Health (OMNIHeart) diet. 212 participants with PAD and BMI \> 25 kg/m2 will be randomized to one of two groups: weight loss + exercise (WL+EX) vs. exercise alone (EX). Participants will be randomized at Northwestern, Tulane University, and University of Minnesota. Our primary outcome is change in six-minute walk distance at 12-month follow-up. Secondary outcomes are change in 6-minute walk distance at 6-month follow-up and change in exercise adherence, physical activity, patient-reported walking ability (measured by the Walking Impairment Questionnaire (WIQ) distance score), and mobility (measured by the Patient-Reported Outcomes Measurement Information System \[PROMIS\] mobility questionnaire) at 12-month follow-up. Tertiary outcomes are perceived exertional effort (measured by the Borg scale at the end of the 6-minute walk at 12-month follow-up), and diet quality. Exploratory outcomes consist of change in the short physical performance battery (SPPB), the WIQ stair climbing and walking speed scores, and calf muscle biopsy measures at 12-month follow-up. Study investigators will perform calf muscle biopsies in 50 participants to compare changes in mitochondrial biogenesis and activity, capillary density, and inflammation between WL+EX vs. EX.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:18 - 89
Sex:All
212 Participants Needed
Our hypothesis is that aggressive preconception weight loss in obese women will improve the metabolic health of the mother and the intrauterine environment. An optimized developmental environment will normalize fetal growth and improve clinical fetal and infant outcomes, and theoretically reduce future susceptibility to obesity and cardiometabolic disease.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18 - 40
Sex:Female
352 Participants Needed
This study will help researchers learn more about how babies respond to bottle nipples with larger or smaller holes. Researchers guess that infants of mothers with obesity who did not lose weight prior to pregnancy will have the greatest Suck Effect on the challenging compared with the typical nipple.
No Placebo Group
Trial Details
Trial Status:Enrolling By Invitation
Trial Phase:Unphased
Age:3+
Sex:All
30 Participants Needed
This research is studying how to help increase uptake of and engagement in formal Diabetes Prevention Programs to improve healthy behaviors among adults with pre diabetes to reduce risk of getting diabetes. This project will compare the Diabetes Prevention Program (DPP) to participating in the DPP program plus two extra pieces (INSPIRA). The 2 additional pieces in the DPP plus program includes getting matched with someone else in the program to provide each other support along with a chance to earn healthy food vouchers. Eligible participants will be randomized to one of the two groups and be asked to participate for approximately 6 months.
No Placebo Group
Trial Details
Trial Status:Enrolling By Invitation
Trial Phase:Unphased
Age:18+
Sex:All
142 Participants Needed
This research study is being performed to begin to determine the effectiveness of two dominant bariatric surgery procedures versus an intensive lifestyle intervention to induce weight loss in patients and promote improvements in Type 2 diabetes mellitus (T2DM) in moderately obese patients. T2DM is currently the 6th leading cause of mortality in the United States and is a major cause of kidney failure, blindness, amputations, heart attack, and other vascular and gastro-intestinal dysfunctions. Traditionally, treatments include intensive lifestyle modifications with or without glucose lowering agents. Neither treatment alone, or in combination, results in complete resolution of diabetes and its potential long-term complications. Bariatric surgery has been proven as an effective treatment to accomplish sustained and significant weight loss for those with severe obesity and has been shown to induce long-term remission of T2DM. However, despite enthusiasm for these potential treatment options, it is not clear whether diabetes is influenced by the type of surgery or by the amount of weight lost or if bariatric surgery is more effective than non-surgical weight loss induced by diet and physical activity in T2DM patients with moderate BMIs (30-40kg/m2; Class I and Class II obesity, or approximately 65-95 pounds overweight depending on your height). More well-controlled studies are needed to more completely inform health care decision making and clinical practice in this area. This research study aims to obtain preliminary information regarding the effectiveness of two major types of bariatric surgery, Laparoscopic Roux-en-Y Gastric Bypass and Laparoscopic Adjustable Gastric Banding versus an intensive lifestyle intervention to induce weight loss with diet and increased physical activity.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:25 - 55
Sex:All
69 Participants Needed
This project addresses obesity in the population with SMI by evaluating a weight management program that is not only evidence-based, it is sustainable, transportable, appealing to patients, easy to use, and minimally burdensome to the healthcare system. This effort addresses two HSR\&D priority areas: 1) Mental Health: Testing new models of care to improve access, cost, and/or outcomes, and 2) Health Care Informatics: Building the evidence base for ehealth/mhealth tools. Innovation: CoachToFit's use of mobile technology is an important innovation in VA service delivery and its user-centered design involving individuals with SMI was the first of its kind. CoachToFit is enhanced by data visualization in real-time via a web-based dashboard used by VA peer specialists and their supervisor. The Investigators are aware of no other evidence-based mobile platforms to help people with SMI reduce their weight
No Placebo Group
Pivotal Trial
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 3
Age:18+
Sex:All
260 Participants Needed
This is an open-label, randomized study comparing a monitored ketogenic diet intervention using standard ketogenic diet (SKD) and standard of care (SOC) dietary recommendations for 16 weeks. Subjects enrolled in the standard of care group will receive a voucher to Weight Watchers after study completion.
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18+
Sex:All
40 Participants Needed
The main purpose of this study is to evaluate the efficacy and safety of orforglipron on maintenance of body weight reduction.
Pivotal Trial
Trial Details
Trial Status:Enrolling By Invitation
Trial Phase:Phase 3
Age:18+
Sex:All
300 Participants Needed
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Frequently Asked Questions

How much do Weightloss clinical trials pay?

Each trial will compensate patients a different amount, but $50-100 for each visit is a fairly common range for Phase 2–4 trials (Phase 1 trials often pay substantially more). Further, most trials will cover the costs of a travel to-and-from the clinic.

How do Weightloss clinical trials work?

After a researcher reviews your profile, they may choose to invite you in to a screening appointment, where they'll determine if you meet 100% of the eligibility requirements. If you do, you'll be sorted into one of the treatment groups, and receive your study drug. For some trials, there is a chance you'll receive a placebo. Across Weightloss trials 30% of clinical trials have a placebo. Typically, you'll be required to check-in with the clinic every month or so. The average trial length for Weightloss is 12 months.

How do I participate in a study as a "healthy volunteer"?

Not all studies recruit healthy volunteers: usually, Phase 1 studies do. Participating as a healthy volunteer means you will go to a research facility several times over a few days or weeks to receive a dose of either the test treatment or a "placebo," which is a harmless substance that helps researchers compare results. You will have routine tests during these visits, and you'll be compensated for your time and travel, with the number of appointments and details varying by study.

What does the "phase" of a clinical trial mean?

The phase of a trial reveals what stage the drug is in to get approval for a specific condition. Phase 1 trials are the trials to collect safety data in humans. Phase 2 trials are those where the drug has some data showing safety in humans, but where further human data is needed on drug effectiveness. Phase 3 trials are in the final step before approval. The drug already has data showing both safety and effectiveness. As a general rule, Phase 3 trials are more promising than Phase 2, and Phase 2 trials are more promising than phase 1.

Do I need to be insured to participate in a Weightloss medical study ?

Clinical trials are almost always free to participants, and so do not require insurance. The only exception here are trials focused on cancer, because only a small part of the typical treatment plan is actually experimental. For these cancer trials, participants typically need insurance to cover all the non-experimental components.

What are the newest Weightloss clinical trials ?

Most recently, we added GRAIL Galleri Test for Detecting Cancer in Unintended Weight Loss, MET097 for Diabesity and Retatrutide for Obesity to the Power online platform.