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
A Global Study of the PETAL Consortium
Massachusetts General Hospital
- Location
- Duarte, CA + 9 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 3
Azithromycin Prophylaxis for PRElabor CEsarean DElivery Trial
The George Washington University Biostatistics Center
- Location
- San Francisco, CA + 13 other US sites
- Eligibility basics
- Any age listed · Women only
- RecruitingHealthy volunteers
Establishing Walking-related Digital Biomarkers in Rare Childhood Onset Progressive Neuromuscular Disorders
Columbia University
- Location
- Palo Alto, CA + 2 other US sites
- Eligibility basics
- Ages 5+
- RecruitingHealthy volunteersPhase 3
Aspirin Dose Escalation for the Prevention of Recurrent Preterm Delivery Trial
The George Washington University Biostatistics Center
- Location
- San Francisco, CA + 13 other US sites
- Eligibility basics
- Ages 14+ · Women only
- RecruitingHealthy volunteers
DILIN - Prospective Study
Duke University
- Location
- Los Angeles, CA + 5 other US sites
- Eligibility basics
- Ages 2+
- RecruitingHealthy volunteers
Genomic Sequencing in Anatomically Normal Fetuses
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteers
California MEPS Hub
University of California, Los Angeles
- Location
- Oakland, CA + 2 other US sites
- Eligibility basics
- Ages 18–59 · Men only
- RecruitingHealthy volunteers
Collection of Immunology Specimens From Patients With Cancer or Blood Disorders, and Healthy Volunteers
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 19+
- RecruitingHealthy volunteers
Kimchi and Gut Health
University of California, Davis
- Location
- Davis, CA + 1 other US site
- Eligibility basics
- Ages 19–70
- RecruitingHealthy volunteers
BID WM Digital Intervention in Aging
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 60–85
- RecruitingHealthy volunteers
Study of Food Aversion in Patients With Anorexia Nervosa
University of California, San Diego
- Location
- La Jolla, CA
- Eligibility basics
- Ages 18–55 · Women only
- RecruitingHealthy volunteersPhase 2
SAMe Trial for Patients With Alcoholic Cirrhosis
Indiana University
- Location
- Los Angeles, CA + 1 other US site
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteersPhase 3
Evaluating Whether an Educational Website Called Current Together After Cancer (CTAC) Improves Follow-up Care for Colorectal Cancer Survivors
SWOG Cancer Research Network
- Location
- Arroyo Grande, CA + 374 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Effects of Brain Stimulation on Cognition, Oscillations and GABA Levels in Schizophrenia
University of California, Davis
- Location
- Sacramento, CA
- Eligibility basics
- Ages 18–47
- RecruitingHealthy volunteers
Pneumatic Compression vs Blood Flow Restriction for Muscle Recovery
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteers
My Life and My Experiences Project
University of California, Irvine
- Location
- Irvine, CA
- Eligibility basics
- Ages 12–18
- RecruitingHealthy volunteers
Continuous Glucose Monitoring (CGM) in Prediabetes With Community Based Recruitment
David S Black, PhD
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 35+
- RecruitingHealthy volunteersPhase 2
Trial of Suvorexant for Sleep in Children With Autism
Stanford University
- Location
- Stanford, CA
- Eligibility basics
- Ages 13–17
- RecruitingHealthy volunteers
Behavior and Risk Awareness Through Video Education for Firefighters
University of California, Davis
- Location
- Sacramento, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Examining the Role of Female Endogenous Sex Hormones in Eccentric Exercise
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–35 · Women only
- RecruitingHealthy volunteers
Neonatal Platelet Transfusion Threshold Trial
NICHD Neonatal Research Network
- Location
- Palo Alto, CA + 19 other US sites
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Moon and Sun Brothers: A Community Prevention Intervention (Hermanos de Luna y Sol)
San Francisco State University
- Location
- San Francisco, CA + 1 other US site
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Pituitary Tumor Surveillance: Pathogenic Correlation
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Understanding Immunity to the Flu Vaccine in COVID-19 Patients
Stanford University
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 9–64
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.