Clinical trials · California
Health clinical trials in California
We’re tracking 342 recruiting health studies with a site in California — including Phase 1/Phase 2, Phase 2, Phase 2/Phase 3 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT07259746Recruiting
Student well-being study
This trial tests a program to help students feel better and thrive in school. It may be a good fit if you are a college student looking for ways to improve your well-being.
Berkeley, CaliforniaAges 18 years+ - NCT07268404Recruiting
Women's Hormonal and Metabolic Health Study
This trial tests a program to help women with irregular periods and hormonal imbalance symptoms like mood swings or skin issues. You'll track your symptoms and provide blood samples from home to see if the program improves your health.
San Francisco, CaliforniaAges 18–45 - NCT07223736Recruiting
AI education for new mothers after birth
This study tests an AI-based education tool for first-time mothers to help with recovery and reduce loneliness after childbirth. You participate from home using your smartphone for 2-6 weeks after delivery.
La Jolla, CaliforniaAges 18 years+ - NCT07227259Recruiting
How pecans affect health
This trial studies how eating pecans every day affects health, including blood sugar and gut health. You may qualify if you are generally healthy and willing to eat pecans and provide blood and stool samples.
Davis, CaliforniaAges 45–75 - NCT06340152Recruiting
Studying maternal health after preeclampsia
This trial follows women who have had preeclampsia to learn more about their health after pregnancy. It collects blood and tissue samples to find markers that could improve future care.
San Diego, CaliforniaAges 18–50 - 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+ - NCT07219251Recruiting
Veterans with lung cancer needed for study
This study wants to learn more about the experiences of veterans with lung cancer. If you are receiving cancer treatment or recently finished it, you may be able to join.
Palo Alto, CaliforniaAges 18 years+ - NCT07221370RecruitingPhase 2/Phase 3
Vancomycin to prevent C. diff infection in ICU patients
This trial tests whether giving vancomycin through a tube into the stomach can prevent a serious gut infection called C. diff in people who are very sick in the ICU and taking antibiotics. If you qualify, you might receive this medicine to lower your risk.
Moreno Valley, CaliforniaAges 18 years+ - NCT07220343Recruiting
Using phones and watches to check on teens and young adults with cancer
This study uses your smartphone and a smartwatch to track your daily activity and mood, helping researchers learn how to better support teens and young adults with cancer. It may help improve mental health care for people your age dealing with cancer.
Palo Alto, CaliforniaAges 10–25 - NCT07220681Recruiting
Integrated Care for PTSD
This study tests whether combining different treatments can help Veterans with PTSD. It focuses on those who can receive Cognitive Processing Therapy (CPT) at a VA site.
San Diego, CaliforniaAges 18 years+ - NCT07215624Recruiting
Survey on blood clot prevention after cancer surgery
This study surveys surgeons and surgical advanced practice providers about how they prevent blood clots (deep vein thrombosis) in patients after cancer surgery. It aims to understand current practices and improve future care.
Oakland, CaliforniaAges 18 years+ - NCT07218510RecruitingPhase 2
Venetoclax, obinutuzumab, then epcoritamab for untreated CLL/SLL
This trial tests a new combination of three drugs for people with chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL) who have not had treatment yet. The goal is to see if this approach helps control the disease with fewer side effects.
Long Beach, CaliforniaAges 18 years+ - NCT07204249RecruitingPhase 2
Testing a diabetes drug to help stop meth use
This study tests whether a medication called 'Glutide' (a GLP-1 agonist, similar to drugs used for diabetes) can help people who want to stop or cut down on methamphetamine. It's for those with moderate to severe meth use disorder who have used meth on at least 15 of the past 30 days.
San Francisco, CaliforniaAges 18–65 - NCT07197216Enrolling by invitation
Tap trust program for water security and drinking
This trial tests a program called Tap Trust to see if it can help families in certain childcare centers feel more secure about their water and drink more water. If you are a parent or caregiver of a preschooler from a specific study group, this might be for you.
Stanford, CaliforniaAges 18 years+ - NCT07187297Recruiting
Radiofrequency skin tightening study for loose skin and wrinkles
This study tests a radiofrequency device called Thermage® FLX to see how well it tightens skin and reduces wrinkles on the neck, face, belly, or upper arms. It may be a good option if you have mild to moderate skin looseness or lines and haven't had recent cosmetic procedures.
Sacramento, CaliforniaAges 30–60 - NCT07189234RecruitingPhase 2
Time-restricted eating for better heart health
This trial tests if eating all your meals within a shorter window each day can improve blood sugar, blood pressure, and cholesterol. You may qualify if you have prediabetes or metabolic syndrome and eat over 12 hours daily.
La Jolla, CaliforniaAges 18–75 - NCT07176793Recruiting
Breastfeeding support after gestational diabetes
This study tests a breastfeeding support program for people who had gestational diabetes during pregnancy. The goal is to see if this support helps them breastfeed longer and stay healthy.
Sacramento, CaliforniaAges 18 years+ - 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.
Petaluma, CaliforniaAges 18–80 - NCT07148245Recruiting
Study of immunotherapy side effects in melanoma
This study looks at how people with advanced melanoma (a serious skin cancer) feel during treatment with immunotherapy. It aims to better understand the symptoms they experience, so doctors can help manage them.
San Francisco, CaliforniaAges 18 years+ - NCT07142044RecruitingPhase 1/Phase 2
Testing EC5026 for Parkinson's disease
This study tests a new oral medication called EC5026 for Parkinson's disease. It aims to see if the drug is safe and if it might help control symptoms when added to your current levodopa treatment.
Sacramento, CaliforniaAges 50–80 - NCT07125729Recruiting
Early cancer detection test for colorectal cancer
This trial uses two blood tests (Signatera and Haystack) to look for tiny bits of cancer DNA after surgery, to find out if the cancer comes back as early as possible. People with stage II, III, or IV colorectal cancer who have had or will have surgery to remove their tumor may join.
Lancaster, CaliforniaAges 18 years+ - NCT07107386Recruiting
Study on health changes in older adults
This study looks at how different parts of your health—like activity, sleep, and biology—change over time in healthy older adults. You'll wear some devices and use a smartphone app to help researchers learn more about aging.
Novato, CaliforniaAges 55 years+ - NCT07095894RecruitingPhase 3
Glasses or eye drops for slowing nearsightedness in kids
This study tests whether special glasses or low-dose atropine eye drops can slow down worsening nearsightedness in children. It compares four groups: glasses alone, eye drops alone, both together, or a placebo (no active treatment).
Fullerton, CaliforniaAges 5–11 - NCT06535789RecruitingPhase 2/Phase 3
Inhaled insulin vs injections for gestational diabetes
This trial compares an inhaled insulin (Afrezza) to insulin injections for managing blood sugar after meals in women with gestational diabetes. The goal is to see if the inhaled option works as well and is easier to use.
Santa Barbara, CaliforniaAges 18–40
Where these studies are running in California
Institutions with a site for the recruiting health studies listed above.
- Stanford University · 3 studies
- City of Hope · 2 studies
- City of Hope at Irvine Lennar · 2 studies
- University of California, Davis · 2 studies
- Alethios
- Altman Clinical and Translational Research Institute
- Buck Institute
- Center on Substance Use and Health
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.