Healthy volunteers · California
Studies for healthy volunteers in California
701 studies have at least one recruiting site in California. These studies say in their official record that they accept healthy volunteers. Many are Phase 1 studies that test how a new medicine is absorbed and tolerated; others recruit healthy people as a comparison group alongside patients.
701 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
More recruiting studies (pay not posted)
- RecruitingHealthy volunteers
PREVENT ALL ALS Study
St. Joseph's Hospital and Medical Center, Phoenix
- Location
- La Jolla, CA + 30 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Human-Created vs AI-generated Art on Immediate Psychological Responses
Stanford University
- Location
- Stanford, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Coronary Atherosclerosis T1-Weighted Characterization (CATCH)
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Pharmacokinetics, Pharmacodynamics, and Safety Profile of Understudied Drugs Administered to Children Per Standard of Care (POPS)
Duke University
- Location
- Palo Alto, CA + 3 other US sites
- Eligibility basics
- Ages 0 mo–20
- RecruitingHealthy volunteers
Measurement and Determinants of Diet Quality in Older Adults
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 60+
- RecruitingHealthy volunteers
Limited Ankle Dorsiflexion and Effect on Single Limb Squats in Individuals With Patellofemoral Pain
Loma Linda University
- Location
- Loma Linda, CA
- Eligibility basics
- Ages 18–59 · Women only
- RecruitingHealthy volunteers
Caring for Dementia Caregivers in Ethnic Immigrant Communities
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 4
Pimavanserin vs. Quetiapine for Treatment of Parkinson's Psychosis
VA Office of Research and Development
- Location
- Loma Linda, CA + 8 other US sites
- Eligibility basics
- Ages 40+
- RecruitingHealthy volunteers
Evidence-Based Quality Improvement to Reduce VA Primary Care Burnout
VA Greater Los Angeles Healthcare System
- Location
- Los Angeles, CA
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Behavioral Safety and Fentanyl Education: BSAFE
San Francisco Department of Public Health
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Validation of Biomarkers for Long COVID in the LIINC Viral Immunopathogenesis and Persistence Repeat Donor Cohort (VIPER)
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Aromatherapy and Its Impact on Preoperative Anxiety, Postoperative Pain, and Patient Experience
Kaiser Permanente
- Location
- Stockton, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 2
Senicapoc in Alzheimer's Disease
University of California, Davis
- Location
- Sacramento, CA + 1 other US site
- Eligibility basics
- Ages 55–85
- RecruitingHealthy volunteers
Establishing Normal Cognitive Test Scores for Adults Using a Voice-Enabled Digital Testing Platform Across the Lifespan
The Neurology Center of Southern California
- Location
- Carlsbad, CA
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteers
Evaluating the Impact of CONNECT in a Multilingual Population
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 50–80
- RecruitingHealthy volunteers
Sauna for Offline Connections and Interactive, Authentic Living
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 19–25
- RecruitingHealthy volunteers
Irritable Bowel Syndrome and Control Volunteers: Diet Challenge
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–75
- RecruitingHealthy volunteers
Body Clocks - Coordination of Peripheral and Central Oscillators
Stanford University
- Location
- Stanford, CA
- Eligibility basics
- Ages 18–30 · Women only
- RecruitingHealthy volunteers
Interventions in Mathematics and Cognitive Skills
Stanford University
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 6–12
- RecruitingHealthy volunteers
HPV Ends Here: Increasing Uptake of the HPV Vaccine
University of California, Davis
- Location
- Sacramento, CA
- Eligibility basics
- Ages 10–12
- RecruitingHealthy volunteers
Pregnancy Registry, Infants, Serum/Milk Analysis (PRISMA)
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–64 · Women only
- RecruitingHealthy volunteers
Inter-Brain Synchrony in Schizophrenia
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
The Influence of Chardonnay Marc Intake on Gut and Cardiometabolic Health
University of California, Davis
- Location
- Davis, CA
- Eligibility basics
- Ages 45–70 · Women only
- RecruitingHealthy volunteersPhase 2
Mindfulness-Assisted Psychedelic Therapy
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 25+
Who these studies look for
“Healthy” is decided at screening, not by you. Sites usually check vital signs, blood and urine tests, an ECG, your medications and sometimes your BMI or smoking status. A study can still turn you away for reasons that have nothing to do with being unwell, such as timing or a full roster.
Matching a page like this one never means you qualify. Each research team decides eligibility at screening.
Questions
Do healthy volunteer studies pay?
Many do, because volunteers give up time and follow strict schedules, but amounts are set by each study and are usually only confirmed by the research site. When a record states an amount we show the exact wording; otherwise we say compensation is not disclosed.
What happens at a screening visit?
Expect consent paperwork first, then a health questionnaire, vital signs, blood and urine samples and often an ECG. You can ask questions and withdraw at any time, before or after you sign.