Clinical trials · California
Health Behavior clinical trials in California
We’re tracking 23 recruiting health behavior studies with a site in California — including Early Phase 1 and Phase 2 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT05984589Recruiting
Health coaching for colorectal cancer survivors
This study tests a personalized health coaching program for people who have had colorectal or other gastrointestinal cancer. It helps you work on lifestyle habits like diet, exercise, and alcohol use to improve your health.
Los Angeles, CaliforniaAges 18 years+ - NCT07339228Enrolling by invitation
Youth soccer and mental health study
This trial combines soccer with behavioral health support to help young people ages 14–21. It tests if joining team sports and group activities improves mental well-being.
Oakland, CaliforniaAges 14–21 - NCT05570734Recruiting
Study of diabetes support for Hispanic/Latino adults online
This study looks at an online (e-health) way to help adults with type 2 diabetes better follow their diabetes care plan. It targets Hispanic/Latino patients and may help improve how consistently people manage their diabetes.
Chula Vista, CaliforniaAges 18 years+ - NCT06131723Enrolling by invitation
UCLA Health email reminders for overdue health screenings
This study sends friendly email reminders to UCLA Health patients who have overdue health screenings or tests, like mammograms or blood work. It aims to help you stay on top of your health.
Los Angeles, CaliforniaAges 18 years+ - NCT07477184Recruiting
Sleep app study for California firefighters
This trial tests a smartphone app designed to help firefighters sleep better, think more clearly, and feel better overall. You might join to improve your sleep and health through a simple program on your iPhone or iPad.
San Luis Obispo, CaliforniaAges 18 years+ - NCT04110756Recruiting
Program to help teens change health behaviors
This study tests a program designed to help teens make healthier choices. It’s for teens who are 15–17 and are currently drinking alcohol, who come to specific UCSF pediatric check-up visits.
San Francisco, CaliforniaAges 15–17 - NCT07475702Recruiting
Brothers of the Moon and Sun: A prevention program for Latino men
This study tests a community program called Hermanos de Luna y Sol (Brothers of the Moon and Sun) designed to lower HIV risk and support Latino men who have sex with men. If you join, you'll take part in group sessions and activities in Spanish to build health and connection.
San Francisco, CaliforniaAges 18 years+ - NCT06856057Recruiting
Support for caregivers and kids after injury
This study helps parents and young children cope with stress after a hospital stay for an injury. It tests a program to improve mental health for both caregivers and kids.
Los Angeles, CaliforniaAges 18 years+ - NCT06581484Recruiting
Improving care for adults with congenital heart disease
This study aims to improve care for adults with congenital heart disease. If you join, researchers will work to better understand your needs and help enhance your treatment.
San Francisco, CaliforniaAges 18 years+ - NCT06454019Enrolling by invitation
Phone reminders to help start your new health plan
This study tests whether phone calls or reminders can help people who lost Medi-Cal and were automatically enrolled into a Covered California silver plan but haven't started using it. They want to see if a simple phone nudge makes it easier to get coverage.
Sacramento, CaliforniaAges Any age - NCT06110091Recruiting
Improving nighttime urination and sleep in older veterans
This study aims to improve nighttime urination (nocturia) and sleep in adults 60 and older. It offers a program that combines behavioral techniques for both bladder control and insomnia, with weekly visits at an Atlanta VA clinic.
Los Angeles, CaliforniaAges 60 years+ - NCT03085875Recruiting
Healthy Pregnancy Study for Moms Using Phone Apps
This study looks at healthy pregnancy habits and support for expecting moms (and moms up to 8 weeks after delivery) through a research community. It may help you compare or improve health behaviors with guidance and study activities delivered on your phone or tablet.
La Jolla, CaliforniaAges 16 years+ - NCT06207110Recruiting
Family support program for children with high food responsiveness
This study tests a program for families with children ages 7–12 who have overweight or obesity and often feel strong urges to eat. The program helps parents support their child in eating healthier and being more active.
La Jolla, CaliforniaAges 7–12 - NCT07167875Enrolling by invitation
Digital coaching trial to improve toothbrushing habits
This study tests if personalized coaching through a smartphone app helps people stick to better toothbrushing habits. Participants use an electric toothbrush and app for 19 weeks to see if coaching improves oral hygiene.
Santa Cruz, CaliforniaAges 18–80 - NCT04997473Recruiting
Mobile app weight-loss program for young transplant patients
This trial tests whether a phone app can help young people who previously had a stem cell transplant lose weight. It’s designed for people who are at least 100 days out from transplant and who meet weight criteria.
Los Angeles, CaliforniaAges 13–30 - NCT07075536Enrolling by invitation
Web tool for birth control decisions with health conditions
This trial tests a web-based tool designed to help people with health conditions make informed choices about birth control. If you have a medical condition or take certain medications and want to discuss contraception with your doctor, this tool may help guide your conversation.
Pomona, CaliforniaAges 18–49 - NCT05620719Recruiting
Study delayed headache after head injury in veterans
This study looks at treatment for ongoing headache that starts or gets worse after a mild or moderate head/neck injury in veterans or active-duty service members. It may help by testing an approach aimed at reducing headache burden and improving daily functioning.
Los Angeles, CaliforniaAges 18–70 - NCT07202247RecruitingPhase 2
Improving heart health in prostate cancer patients on hormone therapy
This study tests whether combining a time-restricted eating plan, a heart-healthy diet, and a weight-loss medication (GLP-1 receptor agonist) can help improve heart health and weight in men with prostate cancer who are receiving hormone therapy. It aims to reduce the risk of heart problems caused by hormone treatment.
Duarte, CaliforniaAges 30–79 - NCT06415721Recruiting
TMS guided by brain scans for alcohol use disorder
This study uses a brain stimulation technique called TMS combined with MRI scans to treat alcohol use disorder. It aims to see if targeting specific brain connections can help reduce drinking.
Palo Alto, CaliforniaAges 25–75 - NCT01327690RecruitingEarly Phase 1
Group therapy for mental health in veterans and families
This early-stage study looks at mental health outcomes for active-duty service members, veterans, and their family members after participating in group therapy sessions. If you can follow instructions and complete consent forms, this trial may help researchers understand how group therapy affects well-being in these communities.
Santa Rosa, CaliforniaAges 18–80 - NCT05516277Recruiting
Insomnia care study for older adults with PTSD
This study tests a treatment plan for insomnia (trouble sleeping) in older adults who also have post-traumatic stress disorder (PTSD). The goal is to see whether improving sleep also supports heart and metabolic health (such as blood sugar and heart-related measures).
North Hills, CaliforniaAges 50 years+ - NCT07219082Recruiting
Fentanyl safety education for people who use stimulants
This study is testing a program called BSAFE that teaches people who use stimulants like cocaine or methamphetamine how to stay safer around fentanyl. It aims to prevent accidental fentanyl exposure and its harms.
San Francisco, CaliforniaAges 18 years+ - NCT07577947Recruiting
Digital tracking to help treat pregnancy and postpartum depression
This study tests whether wearing an Apple Watch and using a smartphone app can help doctors better understand and treat depression during pregnancy and after birth. You'll receive depression treatment through the study while the app and watch track your daily patterns.
Los Angeles, CaliforniaAges 18 years+
Health Behavior trials by city in California
Where these studies are running in California
Institutions with a site for the recruiting health behavior studies listed above.
- University of California, Los Angeles (UCLA) · 3 studies
- University of California, San Francisco · 2 studies
- VA Greater Los Angeles Healthcare System · 2 studies
- VA Palo Alto Health Care System · 2 studies
- California Polytechnic State University
- Cedars-Sinai Medical Center
- Children's Hospital Los Angeles
- City of Hope Comprehensive Cancer Center
What taking part in a health behavior 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.
Health Behavior trials in other states
Common questions
- Are there health behavior clinical trials in California?
- Yes. We're currently tracking 23 recruiting health behavior 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 health behavior 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 health behavior 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 health behavior 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.