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
Voices Illuminating Solutions for Outdoor Workers' Needs and Safety
Stanford University
- Location
- Stanford, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Tear Fluid for the Detection of Tumor-associated Extracellular Vesicles in Glioblastoma Patients
City of Hope Medical Center
- Location
- Duarte, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
ARTFL LEFFTDS Longitudinal Frontotemporal Lobar Degeneration (ALLFTD)
Mayo Clinic
- Location
- Los Angeles, CA + 22 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Nicotinamide Mononucleotide Supplementation for Exercise Tolerance Improvement in Healthy Older Adults
Scott Silveira
- Location
- Beverly Hills, CA
- Eligibility basics
- Ages 60–80
- RecruitingHealthy volunteers
Surgical Thromboprophylaxis Practices in Oncology Patients Within the NCORP Network, STOP-VTE Study
Wake Forest University Health Sciences
- Location
- Oakland, CA + 101 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 4
Prescription of Letrozole for Uterine Myoma
University of California, San Francisco
- Location
- Los Angeles, CA + 4 other US sites
- Eligibility basics
- Ages 21–53 · Women only
- RecruitingHealthy volunteers
The Vanguard Study: Testing a New Way to Screen for Cancer
National Cancer Institute (NCI)
- Location
- Pleasanton, CA + 44 other US sites
- Eligibility basics
- Ages 45–75
- RecruitingHealthy volunteers
Efficacy of mHealth Applications in Weight Management in a Population Affected by Overweight or Obesity
San Diego State University
- Location
- San Diego, CA
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteers
Efficacy of mHealth Apps for Health in a Low-income, Type II Diabetic, Hispanic Population
San Diego State University
- Location
- San Diego, CA
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteers
Collecting Blood Samples From Patients With and Without Cancer to Evaluate Tests for Early Cancer Detection
Alliance for Clinical Trials in Oncology
- Location
- Arroyo Grande, CA + 612 other US sites
- Eligibility basics
- Ages 40–75
- RecruitingHealthy volunteers
Exercise in Child Health
University of California, Irvine
- Location
- Irvine, CA
- Eligibility basics
- Ages 10–17
- RecruitingHealthy volunteers
Efficacy of Using Mobile Health Applications for Health
San Diego State University
- Location
- San Diego, CA
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteers
Smoking Cessation CM for Veterans With or at Risk for Cancer
VA Office of Research and Development
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Promoting Physical Activity and Fitness Among Underserved Latino Families Living in U.S.-Mexico Border Regions
San Diego State University
- Location
- San Diego, CA
- Eligibility basics
- Ages 6+
- RecruitingHealthy volunteers
Gauging Outcomes of Total Milk Ingestion on Lipid and gControl
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
A Multi-level Mother-daughter Physical Activity Intervention for Pre- Adolescent Latinas
San Diego State University
- Location
- San Diego, CA
- Eligibility basics
- Ages 8–65 · Women only
- RecruitingHealthy volunteers
Testing an Enhanced Digital Delivery Model for Inherited Cancer Genetic Testing in Young Adults With Cancer
Alliance for Clinical Trials in Oncology
- Location
- Arroyo Grande, CA + 319 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Family Communications After Genetic Testing
Alliance for Clinical Trials in Oncology
- Location
- Arroyo Grande, CA + 347 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Studying the PAGODA Algorithm for Chemotherapy Dose Changes to Prevent Unplanned Treatment Delays
Alliance for Clinical Trials in Oncology
- Location
- Arroyo Grande, CA + 350 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Cognitive Neurocomputational Task Reliability & Clinical Applications Consortium (CNTRACS): Study 1
Washington University School of Medicine
- Location
- Irvine, CA + 4 other US sites
- Eligibility basics
- Ages 18–59
- RecruitingHealthy volunteers
Buprenorphine Implementation at Syringe Service Programs to Reduce Overdoses
Montefiore Medical Center
- Location
- Los Angeles, CA + 7 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Improving Productive Community Integration in Homeless-experienced Veterans
VA Office of Research and Development
- Location
- West Los Angeles, CA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 4
Bupivacaine With Epinephrine Over Diaphragm in Laparoscopy
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+ · Women only
- RecruitingHealthy volunteers
HeartShare: Combining Omics, Deep Phenotyping, and Electronic Health Records for Heart Failure Subtypes and Treatment Targets
Northwestern University
- Location
- Sacramento, CA + 3 other US sites
- Eligibility basics
- Ages 30+
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.