Clinical trials · California
Health clinical trials in California
We’re tracking 345 recruiting health studies with a site in California — including Phase 2 and Phase 4 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT07279350Recruiting
Health advocate support for children after liver transplant
This study tests whether having a health advocate helps families manage care for their child after a liver transplant. The advocate will provide support and resources to reduce stress and improve the child's recovery.
San Francisco, CaliforniaAges birth–18 years - NCT06436560Enrolling by invitation
Support for transgender and non-binary people seeking vaginoplasty
This study tests a virtual peer support program for transgender and non-binary people who are planning to have vaginoplasty. It aims to see if talking with a trained peer can help with the process.
San Francisco, CaliforniaAges 18 years+ - NCT06544954Recruiting
Grape study for heart and gut health in overweight women
This study tests whether eating California grapes can improve gut health and heart health in overweight or obese women who have been through menopause and may have type 2 diabetes or metabolic syndrome. You would need to eat grapes daily and provide blood and stool samples.
Davis, CaliforniaAges 45–70 - NCT05298605Recruiting
Church-based program to help Korean women get breast screenings
This trial tests a faith-based (church-based) navigation program meant to help Korean women who have not had recent breast cancer screening get a mammogram. It may help by offering support and guidance through church and study staff.
Los Angeles, CaliforniaAges 45–80 - NCT07602374Recruiting
Written vs. Video Education for Breast Reconstruction Surgery
This study compares two ways of learning about breast reconstruction options after mastectomy—reading written materials versus watching videos. Researchers want to see which method helps patients make better-informed decisions and feel more confident about their choice.
San Francisco, CaliforniaAges 18 years+ - NCT07064915Enrolling by invitationPhase 2
Financial help for parents during pregnancy
This study tests a program that combines medical care with financial support to see if it helps parents feel less stressed, improves pregnancy outcomes, and supports healthy baby development. If you are expecting a baby and get care at certain clinics, you may be able to join.
Harbor City, CaliforniaAges 18 years+ - NCT07493239Recruiting
Testing a supplement for knee pain and mobility
This trial studies whether a dietary supplement called MyCondro™ can improve joint health and movement in people with knee osteoarthritis. You will take the supplement for up to 16 weeks and track your symptoms using a smartphone app.
Los Angeles, CaliforniaAges 45 years+ - NCT07528261Recruiting
Support Group for Family Caregivers of Stroke Survivors
This study tests whether a support group using acceptance and commitment therapy (a type of counseling that helps people cope with stress) can reduce caregiver burden and distress. You would meet online with other people caring for stroke survivors.
Alameda, CaliforniaAges 40 years+ - NCT07125001Recruiting
Mango study for Hispanic/Latino teens' health
This study looks at whether eating mango every day for 12 weeks can improve gut health and heart health in Hispanic/Latino teens who are overweight. Participants will be asked to eat a mango product and take daily photos.
Davis, CaliforniaAges 12–19 - NCT06586151Recruiting
HIV prevention program for gender-diverse teens
This study tests a text-message program to help prevent HIV in teens who are transgender, non-binary, or gender-diverse. It aims to see if the program can support healthy choices and reduce risk.
San Clemente, CaliforniaAges 14–18 - NCT05718245Recruiting
HEPA air filters to improve heart and blood sugar health
This study looks at whether using HEPA air filters and monitoring indoor air can improve heart-related health and blood sugar/metabolic health in older adults. You may be eligible if you live in Los Angeles County, don’t smoke, and meet the health and home requirements.
Los Angeles, CaliforniaAges 65–84 - NCT06800833Recruiting
Mango or cookie study for gut, mental, sexual, and skin health
This study is testing whether eating mangoes or low-fat cookies every day for 4 weeks can improve your gut health, and in turn affect your mood, sex life, and skin. If you are generally healthy, not pregnant, and not taking certain medications or supplements, you may be able to join.
San Diego, CaliforniaAges 18–50 - NCT06809933Recruiting
Exercise and movement for gynecologic cancer patients
This study tests whether adding an exercise and activity tracking program can help patients with newly diagnosed gynecologic cancer feel better and handle treatment more easily. You'll wear a Fitbit and get guidance on movement while you go through chemotherapy or surgery.
San Francisco, CaliforniaAges 18 years+ - 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 - NCT07006636Recruiting
Watermelon for heart health in postmenopausal women
This study tests whether eating watermelon can improve heart health and blood pressure in postmenopausal women with slightly elevated blood pressure. It lasts about 4 weeks and involves eating watermelon as part of your usual diet.
Los Angeles, CaliforniaAges Any age - NCT06272045Recruiting
Early heart health support for moms and babies
This study tests a program that helps pregnant women in home visiting take care of their heart health and their baby's health. It is available to women who are pregnant or just had a baby and are in a participating home visiting program.
San Luis Obispo, CaliforniaAges 18 years+ - NCT07306013Recruiting
SolanoConnex mental health access trial
This trial tests a digital platform to help people with mild to moderate mental health symptoms get connected to care. If you live in Solano County, have a smartphone, and haven't used the platform before, you may be able to join.
Vallejo, CaliforniaAges 18 years+ - NCT06185959Recruiting
New mental health group for Asians and Asian Americans
This study is testing a new mental health support group designed for Asian and Asian American adults. It aims to see if this group helps improve emotional well-being and is a good fit for participants.
Palo Alto, CaliforniaAges 18 years+ - NCT07387146Recruiting
Community health worker support for mental health
This trial tests whether a community health worker can help reduce stress in adults who speak English or Spanish. If you feel stressed often, you may be able to join.
San Francisco, CaliforniaAges 18–120 - NCT07671989RecruitingPhase 4
Period pills for late period: a new option
This trial tests if a two-pill combination can safely bring on a late period. It is for people who do not want to be pregnant and understand the pills will end a pregnancy if one exists.
Oakland, CaliforniaAges 18 years+ - NCT05705531Recruiting
Cardiac MRI study of heart health after Hodgkin lymphoma treatment
This study looks at how certain blood-related “growth patterns” connect to long-term heart health after treatment for classical Hodgkin lymphoma. It may help doctors better predict who could develop heart problems and how to monitor them over time.
Duarte, CaliforniaAges 7 years+ - NCT04131036Recruiting
Compare emicizumab and factor VIII for joint and bone health
This study compares two preventive treatments for severe hemophilia A—emicizumab versus factor VIII—to see how they affect joint and bone health. It may help you and others understand which option better protects joints and bones over the next several years.
San Diego, CaliforniaAges 16 years+ - NCT04855773Recruiting
Mobile text-message support to help people stay on PrEP
This trial tests whether phone-based (iPhone/Android) text-message support can improve how consistently people use PrEP, an HIV prevention medicine. It may help you stay on track with refills and clinic visits, especially if you’re at higher risk of stopping PrEP.
San Francisco, CaliforniaAges 15 years+ - 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
Where these studies are running in California
Institutions with a site for the recruiting health studies listed above.
- University of California, San Francisco · 4 studies
- University of California, Los Angeles (UCLA) · 2 studies
- Advancing New Standards in Reproductive Health (ANSIRH)
- California Polytechnic State University
- Cedars-Sinai Medical Center
- Center for Innovative Public Health Research
- City of Hope Comprehensive Cancer Center
- Cultura Y Arte Nativa De Las Americas
What taking part in a health 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.
Common questions
- Are there health clinical trials in California?
- Yes. We're currently tracking 345 recruiting health 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 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 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 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.