Clinical trials · California
Obesity clinical trials in California
We’re tracking 115 recruiting obesity studies with a site in California — including Phase 1, Phase 2, Phase 3 and Phase 4 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT07575399RecruitingPhase 3
Switching to a New Weight-Loss Medication From Current GLP-1
This trial tests whether switching from your current GLP-1 medication (like Ozempic or Wegovy) to a new drug called maridebart cafraglutide works as well or better for weight management. You must have already lost at least 10% of your body weight on your current GLP-1 and be doing well with it.
Palm Springs, CaliforniaAges 18–99 - NCT07284979RecruitingPhase 3
Weekly injection for obesity without diabetes
This trial tests a new once-weekly injection called Ribupatide for weight loss in people with obesity who do not have diabetes. It compares the study drug to an existing medication (semaglutide) and a placebo to see how well it works and if it's safe.
Northridge, CaliforniaAges 18 years+ - NCT07284875RecruitingPhase 3
Ribupatide for weight loss in adults without diabetes
This trial tests a new medication, Ribupatide, to see if it helps people with obesity or overweight who also have weight-related health problems. You cannot have diabetes to join.
Escondido, CaliforniaAges 18 years+ - NCT06672549RecruitingPhase 3
Weight loss medication study for children with obesity
This trial tests a medication for children and teens with obesity or overweight who have not been able to lose enough weight with diet and exercise alone. It aims to see if a new treatment can help them safely lose weight and improve related health problems.
Loma Linda, CaliforniaAges 6–17 - NCT06672939RecruitingPhase 3
Orforglipron for Weight Loss in Teens
This study tests a once-daily pill (orforglipron) to help adolescents with obesity or overweight plus related health problems lose weight. It offers a new option for teens who have struggled to lose weight with diet and exercise alone.
Oxnard, CaliforniaAges 12–17 - NCT07321886RecruitingPhase 3
Study of eloralintide for people with obesity or overweight
This trial tests if an investigational drug called eloralintide can help people with obesity or overweight lose weight. It is for people who do not have type 2 diabetes and who have tried but struggled to lose weight on their own.
Escondido, CaliforniaAges 18 years+ - NCT07284901RecruitingPhase 3
Weekly injection for diabetes and weight loss
This study tests an experimental once-weekly injection called ribupatide for people with type 2 diabetes and overweight. It aims to help them lose weight and better control their blood sugar.
Escondido, CaliforniaAges 18 years+ - NCT03022682Recruiting
Study of inflammation and metabolism across diabetes and weight
This is an observational study that follows generally healthy adults to understand how inflammation, diabetes (type 2), and weight/metabolic health relate to each other. It may help researchers figure out why different groups (including different ethnic backgrounds) have different health risks.
San Francisco, CaliforniaAges 18–75 - NCT04721873RecruitingPhase 2
Weight-loss medicine for people with ulcerative colitis
This study tests whether a weight-loss medication, along with usual ulcerative colitis care, can help people who have both ulcerative colitis and obesity. It focuses on people with active symptoms or who need ongoing steroid medicine, and it also checks safety with heart, blood, infection, and mental-health screenings.
La Jolla, CaliforniaAges 18–80 - NCT05143697Recruiting
Coaching program to help young children reduce excess weight
This trial tests a family wellness coaching program using motivational interview counseling and referrals. It may help families support healthier habits for children ages 2 to 8 who have weight above a recommended range.
Pasadena, CaliforniaAges 2–8 - NCT05165706Recruiting
Study of how obesity affects insulin resistance over time
This study follows adults over time to understand how weight and body chemistry relate to insulin resistance. It may help researchers learn why insulin resistance happens and what could prevent or improve it.
Stanford, CaliforniaAges 35–65 - NCT05419726Recruiting
Semaglutide study to see how brown fat responds in weight loss
This trial studies how brown fat (a type of body fat) changes after starting semaglutide for weight loss. You may help researchers understand how this medication affects the body’s energy use, which could improve weight-loss treatments.
Los Angeles, CaliforniaAges 18 years+ - NCT05726942Recruiting
Using a weight-management mobile app for adults with extra weight
This trial studies whether a mobile phone app can help people manage weight. It may help you if you have overweight or obesity and are able to track your weight with a bathroom scale.
San Diego, CaliforniaAges 18–64 - NCT05740254Recruiting
Compare early versus late eating times for teen obesity
This study tests whether having a shorter daily eating schedule earlier in the day works better than a later eating schedule for reducing weight and improving health in teens with obesity. Participants will also follow planned fasting (not eating) periods and complete regular check-ins.
Los Angeles, CaliforniaAges 12–21 - NCT05912621RecruitingPhase 2
Tirzepatide for fat-related body dysfunction in overweight adults
This Phase 2 study tests whether tirzepatide can improve how your body handles fat (especially in people with overweight or obesity) and reduce fat-related “lipotoxicity.” It may help with body fat function and related health markers, but you must meet specific health and medication rules.
Palo Alto, CaliforniaAges 18–70 - NCT06254768Recruiting
Continuous glucose monitors for kids with obesity
This study tests if using a continuous glucose monitor (CGM), a small device that tracks blood sugar, can help children and teens with obesity understand their body better and improve their health.
Los Angeles, CaliforniaAges 10–21 - NCT07639021RecruitingPhase 2
Testing Different Dose Schedules of a New Weight Loss Medicine
This study tests a new injectable medication (NNC0662-0419) designed to help people with obesity lose weight. Researchers are comparing different ways of increasing the dose to find the safest and most effective approach.
Costa Mesa, CaliforniaAges 18 years+ - NCT06398509Recruiting
Preventing obesity in Latino babies at checkups
This study tests a program that helps prevent childhood obesity in low-income Latino families. It takes place during your baby's regular checkups and offers extra support for healthy feeding and growth.
San Francisco, CaliforniaAges 1 week–2 months - NCT07594093RecruitingPhase 1
A study of REGN20934 for adults with overweight or obesity
This trial tests a new medication, REGN20934, to see how safe it is and how it works in the body for adults who are overweight or have obesity. It may help if you are looking for new treatment options.
Glendale, CaliforniaAges 18–65 - NCT06143956RecruitingPhase 2
Weight loss treatments for adults with obesity
This clinical trial tests new treatments for adults who are overweight or have obesity. The goal is to help people lose weight and improve their health.
Greenbrae, CaliforniaAges 18–75 - NCT06857942RecruitingPhase 4
Tirzepatide added to ixekizumab for psoriasis and weight issues
This trial tests whether adding tirzepatide (a weight-loss and diabetes drug) to ixekizumab (a psoriasis treatment) helps people with moderate-to-severe psoriasis who are overweight or have obesity. It is for those already taking ixekizumab for about 3 months.
Los Angeles, CaliforniaAges 18 years+ - NCT06864026RecruitingPhase 4
Adding tirzepatide to ixekizumab for psoriatic arthritis with weight concerns
This study tests adding tirzepatide (a once-weekly injection for weight and diabetes) to your current treatment with ixekizumab for psoriatic arthritis. It may help with both joint symptoms and weight.
Apple Valley, CaliforniaAges 18 years+ - NCT07090005Recruiting
Endoscopic weight loss: comparing EndoZip and Apollo ESG
This study compares two different endoscopic procedures (EndoZip and Apollo ESG) to help obese patients lose weight. Both are done through the mouth without cutting the skin, and the goal is to see which works better and is safer.
Los Angeles, CaliforniaAges 21–65 - NCT07037459RecruitingPhase 3
A study of a new drug for heart failure with obesity
This trial tests a medication called maridebart cafraglutide for people with heart failure (where the heart doesn't pump as well as it should) and obesity. The goal is to see if it can help improve symptoms and outcomes.
Orange, CaliforniaAges 18–99
Obesity trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting obesity studies listed above.
- Kailera Clinical Site · 3 studies
- Peninsula Research Associates · 3 studies
- Carey Chronis MD Pediatric, Infant and Adolescent Medicine · 2 studies
- Children's Hospital Los Angeles · 2 studies
- Desert Oasis Healthcare Medical Group · 2 studies
- Southern California Clinical Research · 2 studies
- University of California, Los Angeles (UCLA) · 2 studies
- 310 Clinical Research
What taking part in a obesity study involves
A screening visit first
Before anything else, the study team checks whether you fit — usually a visit with some tests. You can stop at any point, and screening is typically free.
Care at a nearby site
Study visits happen at a clinic or hospital taking part. Many studies cover the cost of the study treatment and related visits, and some reimburse travel.
You stay in control
Taking part is voluntary and you can leave a study at any time, for any reason, without affecting your regular care.
The team decides eligibility
Our fit check is a helpful first read, not a decision. The study team makes the final call after reviewing your health history.
Obesity trials in other states
Common questions
- Are there obesity clinical trials in California?
- Yes. We're currently tracking 115 recruiting obesity studies with a site in California, each rewritten in plain language so you can see what it's testing and who it's for.
- How do I find out if I qualify for a obesity study in California?
- Each study lists its eligibility rules — age, diagnosis, prior treatments. On every trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Do I have to live in California to take part?
- Not necessarily. These studies have a site in California, but eligibility is about your health, not your address — some people travel to take part, and a few studies reimburse travel. The study team can tell you what's required.
- Does it cost anything to join a obesity trial?
- Using Clin2 is always free. Many trials cover the study treatment and related visits; some reimburse travel. The study team explains exactly what's covered before you decide.
Not the right time?
New obesity studies open in California regularly. Set up a health profile and we’ll quietly watch for studies that fit you and email you when one opens.
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.