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
Development of a Novel Stress Testing Protocol to Define the Relationship Between Coronary Microvascular Dysfunction and Diastology in Women With Angina But No Evidence of Obstructive Coronary Artery Disease
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–60 · Women only
- RecruitingHealthy volunteers
Neuroimaging Biomarkers for Predicting rTMS Response in OCD
Stanford University
- Location
- Stanford, CA
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteers
Rady Children's Institute Genomic Biorepository
Rady Pediatric Genomics & Systems Medicine Institute
- Location
- San Diego, CA
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Comparing Mobile Health Strategies to Improve Pre-exposure Prophylaxis Use (PrEP) for HIV Prevention
Public Health Foundation Enterprises, Inc.
- Location
- San Francisco, CA + 2 other US sites
- Eligibility basics
- Ages 15+
- RecruitingHealthy volunteers
Neurobiologic, Immunologic, and Rheumatologic Markers in Youth With PANS
Stanford University
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 4–18
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.