Clinical trials · California
Fasting clinical trials in California
We’re tracking 18 recruiting fasting studies with a site in California — including Phase 1, Phase 1/Phase 2 and Phase 2 studies, each written for real people, not researchers.
Recruiting studies in California
- NCT06751043Recruiting
Testing if fasting before a procedure is needed in ICU patients
This trial tests whether not eating before a procedure (called preoperative fasting) is better than fasting in ICU patients who are already receiving tube feedings. It aims to find out if skipping the fast can help you without causing extra risks.
San Francisco, CaliforniaAges 18 years+ - NCT05819801Recruiting
Testing how fasting affects outcomes in certain hand procedures
This study looks at whether fasting before a specific hand surgery done with local numbing medicine (and without a tourniquet) changes patient outcomes. It may help explain how to prepare for this type of procedure and what fasting rules are safest.
Orange, CaliforniaAges 18 years+ - NCT05832086RecruitingPhase 2
Fasting-mimicking diet to improve prostate cancer and metabolism
This trial tests whether an intermittent, fasting-like diet can help control metastatic prostate cancer and improve metabolic health in men on hormone therapy. Participants follow a specific diet plan and are monitored by the study team.
Duarte, CaliforniaAges Any age - NCT05910567Recruiting
Ultrasound test for abdominal injuries in children after blunt trauma
This study looks at how well an abdominal ultrasound test (FAST) works for children who come to the emergency department after a serious blunt injury to the belly or torso. The goal is to help doctors find dangerous internal bleeding or organ injury quickly and safely.
Sacramento, CaliforniaAges Up to 17 years - NCT06307275Recruiting
Intermittent fasting for body fat and quality of life
This trial tests if intermittent fasting can help reduce body fat and improve how you feel day-to-day. It's for people who are generally healthy.
Loma Linda, CaliforniaAges 18–65 - NCT05104502Recruiting
Study how 36-hour water fasting affects immune signals
This study looks at how a 36-hour water-only fast changes immune-related markers and gut (microbiome) signals in healthy adults. It may help researchers understand how fasting could affect health, even though this trial is focused on people without major medical conditions.
Sacramento, CaliforniaAges 20–40 - NCT03615690Recruiting
Fasting-mimicking diet test for ulcerative colitis
This study tests whether a “fasting-mimicking diet” can improve mild to moderate ulcerative colitis. You would follow the study diet plan and be monitored to see if symptoms and disease activity change.
Palo Alto, CaliforniaAges 18–70 - NCT07223177Recruiting
Testing a new oxygen monitor for infants, children, and teens
This trial is testing a new type of oxygen sensor worn on the skin to see if it works well for children and teenagers. It may help doctors get better readings of oxygen levels in the blood.
Modesto, CaliforniaAges birth–21 years - NCT06093477Recruiting
Melatonin and recovery for teens after surgery
This study tests whether taking melatonin (a natural sleep hormone) after a major bone or joint surgery helps teens recover better. If you are 12-18 and having a surgery like scoliosis repair, you may be able to join.
Palo Alto, CaliforniaAges 12–18 - NCT06671613Recruiting
Fasting-mimicking diet with immunotherapy for advanced lung cancer
This study combines a special periodic diet that mimics fasting with the standard immunotherapy drug pembrolizumab (Keytruda) for people with advanced non-small cell lung cancer. The goal is to see if the diet can help the immunotherapy work better.
Long Beach, CaliforniaAges 18 years+ - 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 - NCT07177261Recruiting
Brain synchrony study for schizophrenia
This study looks at how brain activity syncs between people with schizophrenia and others. It aims to understand social interaction differences—potentially leading to better treatments.
Los Angeles, CaliforniaAges 18–65 - NCT07736937RecruitingPhase 1/Phase 2
Study of TUB-040 with Standard Drugs for Ovarian Cancer
This study tests a new medicine called TUB-040, given together with standard ovarian cancer drugs like carboplatin and bevacizumab. It is for women with ovarian cancer that has returned after responding to platinum-based chemotherapy and is growing again. The goal is to see if this combination can help control the cancer.
Los Angeles, CaliforniaAges 18 years+ - NCT07225816RecruitingPhase 1
How fasting affects stomach food with GLP-1 drugs
This study looks at how long fasting and temporarily stopping certain diabetes or weight-loss medications (like semaglutide or liraglutide) affects how much food stays in your stomach. It may help understand how these medications work in people who are overweight.
Cypress, CaliforniaAges 18 years+ - NCT06336902RecruitingPhase 1
Immunotherapy plus fasting diet and vitamin C for KRAS-mutated colorectal cancer
This trial tests a combination of two immunotherapy drugs (botensilimab and balstilimab) plus a fasting-mimicking diet and high-dose vitamin C for people with a specific type of advanced colorectal cancer (KRAS-mutated). It aims to see if this approach can help when standard treatments have stopped working.
Fullerton, CaliforniaAges 18 years+ - NCT06515782Recruiting
Fasting-mimicking diet for multiple sclerosis
This study tests whether a special low-calorie diet that mimics fasting can help people with multiple sclerosis feel better and reduce inflammation. Over several months, participants will follow this diet in cycles and be monitored with MRI scans and blood tests.
Los Angeles, CaliforniaAges 18–55 - NCT06789172RecruitingPhase 1
New drug OKN4395 with or without pembrolizumab for solid tumors
This trial tests a new oral drug called OKN4395, which targets a COX2-related immune pathway, alone or with the immunotherapy pembrolizumab, in people with advanced solid tumors. It may be an option if you have certain types of cancer that have stopped responding to other treatments.
Santa Monica, CaliforniaAges 18 years+ - NCT04539717Enrolling by invitation
Fast MRI test for liver cancer screening
This study tests a quicker MRI screening approach for people with cirrhosis to look for liver cancer early. It may help make liver cancer checkups faster and easier while still finding cancers when they are small.
Los Angeles, CaliforniaAges 18 years+
Where these studies are running in California
Institutions with a site for the recruiting fasting studies listed above.
- Cedars-Sinai Medical Center · 2 studies
- University of California, Davis Medical Center · 2 studies
- Altasciences Clinical Los Angeles, Inc.
- Beckman Research Institute of City of Hope
- City of Hope Comprehensive Cancer Center
- Loma Linda University
- Los Angeles General Medical Center
- Lucile Packard Children's Hospital at Stanford
What taking part in a fasting 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.
Fasting trials in other states
Common questions
- Are there fasting clinical trials in California?
- Yes. We're currently tracking 18 recruiting fasting 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 fasting 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 fasting 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 fasting 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.