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39 Weight Loss Trials near San Diego, CA

Power is an online platform that helps thousands of Weight Loss 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.

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Blueberries for Weight Loss

San Diego, California
The objective is to complete a two-phase study to assess how wild blueberries impact regulation of appetite of overweight and obese men and women as well as to determine if wild blueberries can promote more effective weight loss than an isocaloric control. For phase I, the acute effects of consuming 1-cup of frozen wild blueberries mixed into ¾ C of low-fat yogurt will be compared to consuming an isocaloric serving of yogurt mixed with an artificially flavored and colored blueberry syrup. During acute testing, subjective ratings of appetite, glucose metabolism, and appetite-regulating hormones will be assessed. Phase II will consist of an 8-week feeding trial in which the same subjects will consume daily servings of yogurt mixed with either frozen wild blueberries or placebo syrup along with intensive counseling for weight loss. The hypothesis is that wild blueberries will reduce hunger by regulating appetite hormones and promoting beneficial glycemic and insulinemic responses and that daily consumption of wild blueberries will translate to improved adherence to a weight loss regimen and therefore greater weight and fat loss. Secondary aims for Phase II of this project will include exploring the impacts of blueberry consumption during weight loss on antioxidant status, inflammatory markers, blood lipid profiles, glucose status, dietary intake, physical activity and blood pressure.
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18 - 50
Sex:All
40 Participants Needed
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 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
A phase 2 study to assess the efficacy of NA-931 alone or in addition to Tirzepatide to assess efficacy and safety in overweight or obese men and women
Trial Details
Trial Status:Not Yet Recruiting
Trial Phase:Phase 2
Age:19 - 80
Sex:All
224 Participants Needed
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Orforglipron for Obesity

Spring Valley, California
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
This trial is testing tirzepatide, a medication that helps people lose weight, to see if it can also help them keep the weight off. The study involves people who have already lost weight and need help maintaining it. Tirzepatide works by making people feel full and reducing their appetite. Tirzepatide has been effective in helping people lose weight and manage blood sugar levels.
Pivotal Trial
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Phase 3
Age:18+
Sex:All
400 Participants Needed
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PBT-EF for Obesity and ADHD

San Diego, California
This trial is testing a new program that helps parents teach their overweight or obese children with ADHD how to manage their weight and improve their behavior. The program includes special training to help kids focus better and control their impulses. The goal is to make it easier for these children to stick to healthy habits. Parents focused CBT can be considered as a complementary treatment for reducing ADHD symptoms and BMI and increased self-esteem in the obese ADHD children.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:8 - 12
Sex:All
30 Participants Needed
The objective of this proposed study is to collect efficacy data on ROC+ compared to an active comparator (AC) and to Behavioral Weight Loss (BWL) for participants who are high in Food Responsiveness.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18 - 65
Sex:All
300 Participants Needed
Obstructive sleep apnea (OSA) is a highly prevalent disorder that is associated with both cardiovascular and metabolic dysfunction, such as hypertension, increased blood glucose levels and diabetes, obesity, and nonalcoholic fatty liver. While continuous positive airway pressure (CPAP), the best available OSA treatment, has been shown to improve blood pressure in OSA, it does not appear to improve metabolic consequences of OSA, and other therapies for OSA-induced dysmetabolism are needed. Animal models of time restricted eating (TRE) demonstrate an improvement in glucose and lipid metabolism, even in the absence of a reduction of caloric intake. Some human studies have shown an improvement in metabolic dysfunction with TRE, though further well-designed studies are needed. The effects of TRE on metabolic dysfunction in patients with OSA, a population with a high predisposition to metabolic disorder, has never been examined. In this study, we will conduct a randomized clinical trial to assess the feasibility and efficacy of 12 weeks of TRE, versus standard eating (SE), to improve glucose regulation and cardiovascular health of participants with OSA.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Early Phase 1
Age:18 - 70
Sex:All
80 Participants Needed
The objective of this proposed study is to compare Regulation of Cues (ROC), Family-Based Treatment (FBT), ROC+ nutrition education and reducing energy intake (ROC+) and a health education comparator (HE) for children with overweight or obesity who are high on food responsiveness (FR).
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:7 - 12
Sex:All
280 Participants Needed
In a randomized controlled trial, the investigators intend to measure the health impact of time-restricted eating (TRE) in obese patients (body mass index (BMI) ≥ 30 kg/m2), who habitually eat for more than 14 hours every day. Patients will be randomly assigned to a control group of behavioral nutritional counseling (standard of care) or the intervention group of behavioral nutrition counseling with the addition of adopting a 10-hour eating window for 12 weeks (TRE).
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18+
Sex:All
61 Participants Needed
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BI 456906 for Diabetes and Obesity

Spring Valley, California
This study is open to adults who are at least 18 years old and have a body mass index of 27 kg/m² or more. People can take part if they have type 2 diabetes and if they are currently being treated only with diet and exercise or with specific diabetes medications. Only people who have previously not managed to lose weight by changing their diet can participate. The purpose of this study is to find out whether a medicine called survodutide (BI 456906) helps people living with overweight or obesity who also have diabetes to lose weight. Participants are divided into 3 groups by chance, like drawing names from a hat. 2 groups get different doses of survodutide and 1 group gets placebo. Placebo looks like survodutide but does not contain any medicine. Every participant has a 2 in 3 chance of getting survodutide. Participants inject survodutide or placebo under their skin once a week for about one and a half years. In addition to the study medicine, all participants receive counselling to make changes to their diet and to exercise regularly. Participants are in the study for about 1 year and 7 months. During this time, it is planned that participants visit the study site up to 14 times and receive 6 phone calls by the site staff. The doctors check participants' health and take note of any unwanted effects. The study staff also regularly measure participants' body weight. The results are compared between the groups to see whether the treatment works.
Pivotal Trial
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Phase 3
Age:18+
Sex:All
756 Participants Needed
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VK2735 for Obesity

Lake Forest, California
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
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Retatrutide for Obesity

Santa Ana, California
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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GZR18 vs Tirzepatide for Obesity

Fountain Valley, California
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
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Lomaira for Childhood Obesity

Loma Linda, California
The purpose of this study is to treat toddler obesity by improving the toddler nutritional environment. Parents will participate in a free internet nutrition program and may also take obesity medication. These measures may improve the parental nutritional environment and in turn, improve the toddler nutritional environment as well.
No Placebo Group
Trial Details
Trial Status:Not Yet Recruiting
Trial Phase:Phase 4
Age:12 - 75
Sex:All
50 Participants Needed
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Ponsegromab for Cachexia

Redlands, California
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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LY3841136 for Obesity

Rolling Hills Estates, California
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

Rolling Hills Estates, California
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
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Semaglutide for Childhood Obesity

Los Angeles, California
This is a Phase 3a, randomized, parallel-controlled trial designed to compare the early re-initiation of semaglutide, starting two weeks after sleeve gastrectomy, to standard care (no pharmacotherapy following surgery). The trial will involve 150 youth with severe obesity who have been on semaglutide 2.4 mg weekly for at least 3 months prior to surgery. Participants will be randomized to either (1) semaglutide 2.4 mg weekly or (2) standard care for 24 months. Primary, secondary, and tertiary outcomes will be assessed at multiple time points: 1-month, day of surgery, and 1-, 3-, 6-, 9-, 12-, 18-, and 24-months postoperatively. We hypothesize that early re-initiation of semaglutide will be safe, well-tolerated, and lead to greater improvements in obesity, cardiometabolic risk, and eating behaviors.
No Placebo Group
Pivotal Trial
Trial Details
Trial Status:Not Yet Recruiting
Trial Phase:Phase 3
Age:12 - 18
Sex:All
150 Participants Needed
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Phentermine for Obesity

Los Angeles, California
This trial is studying the long-term effects of the weight-loss drug phentermine on people with obesity. The drug helps by making you feel less hungry and burning more calories. Researchers want to see if it is safe and effective over an extended period. Phentermine has been used in various formulations and combinations for weight loss, showing modest efficacy but with potential cardiovascular and psychiatric side effects.
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Phase 4
Age:18 - 70
Sex:All
870 Participants Needed
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Walnuts for Prostate Cancer

Los Angeles, California
This is a randomized control trial testing the effect of walnut supplementation on prostate cancer progression in 50 men with biopsy confirmed prostate cancer and planning to undergo RP. Patients consented to the study will be randomly assigned to either continue their usual diets (control arm) or to the walnut arm for 4-10 weeks depending on the window between their consent date and the date for RP.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 2
Age:18+
Sex:Male
50 Participants Needed
The Early Detection Initiative for Pancreatic Cancer is a multi-center prospective study to determine if algorithm-based screening in patients with glycemically defined new onset hyperglycemia and diabetes has the potential for earlier detection of pancreatic ductal adenocarcinoma.
No Placebo Group
Trial Details
Trial Status:Enrolling By Invitation
Trial Phase:Unphased
Age:50 - 85
Sex:All
9000 Participants Needed
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SADI Surgery Revision for Obesity

Los Angeles, California
The goal of this study is two part: 1) to add to the literature which is still somewhat sparse with numbers of patients undergoing the Single Anastomosis Duodenal Ileal Bypass (SADI) as a revision for laparoscopic sleeve gastrectomy (LSG) and 2) to have a treatment option for our Kaiser Permanente patients who seek additional assistance after a LSG with persistent morbid obesity and the comorbidities that come with it.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18 - 100
Sex:All
54 Participants Needed
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Weight Loss App for Obesity

Los Angeles, California
Childhood obesity within the United States has been a growing concern over the past number of years, and if not addressed, leads to detrimental health outcomes for youth as they move into adulthood. The literature suggests that over-eating, especially when framed in terms of food addiction, plays a key role in this epidemic; however, treatment options are time intensive, posing a profound logistical barrier for both the child and parent and often limits or prevents engagement. As research within the field of mHealth has grown, technology-based interventions have gained traction, specifically interactive smartphone applications (apps). Displacement theory, although not new, has been understudied yet provides a strong explanation and treatment plan for addictive type behaviors. The core of this theory posits that problems which one feels they cannot face nor avoid leads to repetitive and irrepressible behaviors; however, if a healthy coping behavior can be learned and utilized, then the unhealthy behavior will cease. The theory lends itself well to being adapted into an mHealth format, making it more easily accessible and more widely used. Grounded in displacement theory, the proposed study aims to develop an app-based weight loss intervention for adolescents with obesity. Information gained regarding the feasibility and acceptability of such an intervention can potentially be replicated and applied to other populations with various addictive behaviors. Helping those with addictive behaviors in a format that has little to no logistical barriers can have a substantial impact on public health. A novel smartphone app will be designed by key stakeholders and refined through the course of the study. 46 total adolescents (14-18 years old) with %BMIp95 will be recruited via various sources (e.g., clinic referrals, flyers, social media advertising) to participate in one of two stages of the study: the beta testing stage or the trial stage. Beta testing will enroll two successive groups of eight teens to test the app for three weeks; participants will be assessed in-person pre- and post-intervention. After each group, the app will be modified to incorporate their feedback in order to promote youth engagement. The trial stage will enroll 30 adolescents to participate in a four-month intervention; participants will complete three assessments, baseline, post-intervention (both in-person) and one-month post-intervention (either in-person or virtually). The study will examine engagement and satisfaction with the app, as well as the intervention's impact on clinical outcome measures (weight and BMI, diet and snacking, and addictive behaviors related to food and substance use) and potential mediators/moderators (motivation for change, perceived stress, and distress tolerance).
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:14 - 18
Sex:All
46 Participants Needed
This trial studies the effects of weight loss surgery on patients who do not have other weight-related health problems. The surgery helps people lose weight by making their stomach smaller or changing how their body digests food. Researchers want to see how this surgery affects their health, mood, quality of life, and emotional well-being.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:All
Sex:All
20 Participants Needed
Pilot study enrolling obese post HSCT (hematopoietic stem cell transplantation) patients at the hematology/oncology clinic at the Mattel Children's Hospital, University of California, Los Angeles. Parameters include percent over the 95th percentile (%BMIp95), zBMI, fasting metabolic metrics, addictive eating habits, and motivation for change.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:13 - 30
Sex:All
20 Participants Needed
This early phase I trial studies how well a behavioral weight loss intervention consisting of a smartphone application and coaching works for the promotion of weight loss in adolescents and young adults after a stem cell transplant. This study may help researchers learn more about how adolescents and young adults can lose weight and develop healthy eating habits.
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Unphased
Age:13 - 30
Sex:All
20 Participants Needed
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Bariatric Surgery for Obesity

Los Angeles, California
Most research to date on bariatric surgery outcomes has been about metabolic syndrome, a disorder very effectively treated by bariatric surgery. However, obesity is also associated with many other problems that have received much less attention. Amongst the most troubling of these for patients is dyspnea. Dyspnea results in substantial patient distress that can greatly reduce health-related quality of life. Little is known about the relationship between dyspnea, weight loss, and bariatric surgery. Dyspnea is a complex symptom that may lead to adaptive responses, such as the need to rest as a consequence of even minimal activity or seeking medical attention. The main outcome of the study will be measured using a new state-of-the-science validated HRQOL measure, the Patient Reported Outcome Measuring Information System for Heart Failure (PROMIS+HF 27).
No Placebo Group
Trial Details
Trial Status:Recruiting
Trial Phase:Phase 4
Age:18+
Sex:All
40 Participants Needed
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TOTAL Program for Obesity

West Los Angeles, California
Nearly 8 in 10 Veterans meet criteria for overweight/obesity. Three evidence-based treatment options are available within VA (behavioral weight management \[MOVE!\], obesity medications, and bariatric surgery). However, all treatments are significantly underutilized. This study will evaluate the effectiveness of a novel intervention designed to increase obesity treatment initiation and subsequently weight loss within VA. The intervention, Teaching Obesity Treatment Options to Adult Learners (TOTAL), involves an educational video and multiple motivational sessions delivered via telemedicine. If effective, TOTAL could be implemented throughout VA without requiring significant resources and could be integrated into the existing VA behavioral weight management program, MOVE!, which is present at nearly every VA medical center.
No Placebo Group
Trial Details
Trial Status:Active Not Recruiting
Trial Phase:Unphased
Age:18 - 70
Sex:All
440 Participants Needed
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Frequently Asked Questions

How much do Weight Loss clinical trials in San Diego, CA 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 Weight Loss clinical trials in San Diego, CA 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 Weight Loss trials in San Diego, CA 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 in San Diego, CA for Weight Loss 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 in San Diego, CA 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 Weight Loss medical study in San Diego, CA ?

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 Weight Loss clinical trials in San Diego, CA ?

Most recently, we added Semaglutide for Childhood Obesity, Lomaira for Childhood Obesity and NA-931 and Tirzepatide for Obesity to the Power online platform.