Clinical trials · California
Health clinical trials in California
We’re tracking 342 recruiting health studies with a site in California — including Early Phase 1, Phase 1, Phase 2, Phase 3 and Phase 4 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT03774758Recruiting
Blood tests to estimate lung cancer risk over 3 years
This study looks for blood “biomarkers” (measurable signs in blood) that may help predict who is at higher or lower risk related to lung cancer. You would have blood samples taken and then be followed with visits for up to 3 years.
San Francisco, CaliforniaAges 40 years+ - NCT03968393RecruitingPhase 4
Blood thinner to prevent stroke after stress-related irregular heartbeats
This trial tests whether taking a blood thinner can lower the risk of stroke in people who had atrial fibrillation (an irregular heartbeat) that happened temporarily around a stressful illness or surgery. It looks especially at people at higher risk for stroke after that episode.
Los Angeles, CaliforniaAges 55 years+ - NCT03987763RecruitingPhase 4
Study of psoriasis lotion safety in children ages 6–16
This trial tests how safe and how the body handles (pharmacokinetics) a psoriasis lotion called IDP-122 when used in children with plaque psoriasis. You may be able to join if your child has a suitable amount of plaque psoriasis and can follow safety rules during the study.
Fountain Valley, CaliforniaAges 6–17 - NCT04005976Recruiting
Genetic study for inherited aortic disease
This trial is for people with inherited (family-run) aortic enlargement or aneurysm caused by a specific DNA gene change. It uses genetic information to guide more precise care, which may help tailor monitoring and treatment for you and your family.
Newport Beach, CaliforniaAges Any age - NCT05524597RecruitingPhase 1
Older adults write about health experiences
This study looks at how writing about your life experiences and health affects outcomes in older adults. If you’re 65 or older and meet health and safety requirements, you may be able to take part.
Los Angeles, CaliforniaAges 65 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 - NCT04181138Recruiting
Study of childhood primary sclerosing cholangitis types
This study follows children and young adults with primary sclerosing cholangitis (PSC) to understand the condition and how it shows up on scans or biopsy. It may help doctors better recognize PSC and choose the best next steps for care.
Los Angeles, CaliforniaAges 2–25 - NCT04199676Recruiting
Testing blood sugar after delivery for gestational diabetes
This study checks your blood sugar shortly after birth (on day 0 or day 1) to see how well glucose testing works for people who had gestational diabetes. The results may help guide follow-up care and reduce the risk of longer-term blood sugar problems.
Long Beach, CaliforniaAges 18 years+ - NCT04248127Recruiting
Honey yogurt to improve gut health and mild inflammation
This study tests whether honey-flavored yogurt can improve gut health and “low-grade” inflammation in middle-aged and older women after menopause. You may be asked to follow a yogurt-focused plan and avoid certain foods or supplements to see the effect.
Davis, CaliforniaAges 45–65 - NCT04297020Recruiting
Checking brain health in breast cancer survivors
This study looks at differences in brain function in people who have had breast cancer, compared with certain people without that history. It’s testing how brain health changes after breast cancer and relates to mood, thinking, and daily functioning.
Los Angeles, CaliforniaAges 35–65 - NCT04314375RecruitingPhase 4
Budesonide tablets for children with mild to moderate ulcerative colitis
This trial studies whether budesonide extended-release tablets are safe and effective for improving symptoms in children ages 5–17 with active, mild to moderate ulcerative colitis. It also measures how the medicine moves through the body.
Garden Grove, CaliforniaAges 5–17 - NCT04378790RecruitingPhase 3
Patch one eye by itself or together with glasses
This study tests whether children with amblyopia (lazy eye) should start patching one eye after glasses first, or start patching at the same time as glasses. The goal is to find the best approach to improve vision.
San Francisco, CaliforniaAges 3–13 - NCT04390009RecruitingEarly Phase 1
Whole-body PET scans in people with multiple sclerosis
This early study tests how whole-body PET-CT scans can be used in people with multiple sclerosis (and compares with healthy volunteers). It may help researchers understand what the scan can show in MS throughout the body.
Ladera Ranch, CaliforniaAges 25–55 - NCT04420156Recruiting
Study to understand eye disease risk in premature babies
This study looks at newborn eye exams and genetic information to better understand why some premature infants develop a serious vision problem called ROP. You may be invited because your baby needs routine eye screening or is being moved for specialized eye care.
Palo Alto, CaliforniaAges Up to 1 year - NCT04474223RecruitingPhase 3
Prevent early fetal heart rhythm problems with medicine
This study tests medicines given during pregnancy (dexamethasone and IVIG) to help prevent a type of fetal heart rhythm problem that can happen quickly. It focuses on people at higher risk based on specific blood antibody results and early pregnancy timing.
Los Angeles, CaliforniaAges 18 years+ - NCT04540107RecruitingPhase 1
MRI scan study to characterize lower-grade brain tumors
This Phase 1 study uses special MRI scans (including a form of MR spectroscopy) to better understand lower-grade gliomas. It is designed to test how well the imaging can “characterize” the tumor and to improve understanding for treatment planning.
San Francisco, CaliforniaAges 18 years+ - NCT04543461Recruiting
Lung health study for young adults in the U.S.
This study follows young adults to learn about lung health and risk factors. It may help researchers better understand how breathing symptoms and exposures affect future lung outcomes.
Los Angeles, CaliforniaAges 25–35 - NCT04732065RecruitingPhase 1
ONC206 for certain brain tumors in children and young adults
This Phase 1 study tests ONC206, a new targeted medicine, for diffuse midline gliomas (DMG) with a specific gene change (H3K27 altered) and for some other recurrent brain/spinal cord cancers. It is designed to find the right dose and see whether it can control or shrink tumors after initial treatment or when the cancer returns.
San Francisco, CaliforniaAges 2–21 - NCT04742608Recruiting
Liquid blood tests to diagnose thyroid nodules or cancer
This study tests whether a blood “liquid biopsy” can help diagnose thyroid cancer or hard-to-tell thyroid nodules without needing extra procedures. It may help confirm what’s going on before or around planned thyroid surgery.
Los Angeles, CaliforniaAges 18 years+ - NCT04743765Recruiting
Faster hip fracture care for people with heart stress signs
This study looks at an “accelerated” hospital plan to get surgery and treatment started sooner for some people with a hip fracture who also show signs of heart stress in blood tests. It may help reduce delays and improve safety during urgent hip fracture care.
Davis, CaliforniaAges 45 years+ - NCT04763980Recruiting
Health coaching to help Black men get prostate germline genetic testing
This study tests a community health coach to help Black men with prostate cancer understand and access genetic testing that looks for inherited cancer risk. It may help you talk with your care team about testing and reduce barriers to getting results.
San Francisco, CaliforniaAges 18 years+ - NCT06848088Enrolling by invitationPhase 2
Long-term health study for melanoma participants
This study checks on the long-term health of adults with melanoma who took part in a previous treatment study. It aims to see how participants are doing over time after receiving the new therapy.
Los Angeles, CaliforniaAges 18 years+ - NCT04970056Recruiting
Pancreatic cancer risk and early-detection registry study
This study builds a database of people at higher risk for pancreatic cancer (or certain early warning findings) to help find better ways to detect the disease early. You may be asked to complete health questionnaires and possibly donate a blood/saliva/swab sample.
Burbank, CaliforniaAges 18–90 - NCT05002751Recruiting
Measuring how radiation affects vaginal narrowing in cervical cancer
This study measures how radiation therapy changes the vagina’s flexibility and shape in people with newly diagnosed, advanced cervical cancer that has spread to nearby lymph nodes. The goal is to better understand what happens over time, which may help guide prevention and treatment of vaginal narrowing.
La Jolla, CaliforniaAges 18–99
Where these studies are running in California
Institutions with a site for the recruiting health studies listed above.
- University of California, San Francisco · 9 studies
- University of California, Los Angeles (UCLA) · 4 studies
- Stanford University · 3 studies
- Cedars-Sinai Medical Center · 2 studies
- Children's Hospital Los Angeles · 2 studies
- Hoag Memorial Hospital Presbyterian · 2 studies
- San Francisco VA Medical Center · 2 studies
- University of California, Davis · 2 studies
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 342 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.