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
Medial-prefrontal Enhancement During Schizophrenia Systems Imaging
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteers
A Randomized Controlled Trial Testing the Effect of the Youth Mindful Awareness Program on Negative Affect (YMAP2).
Vanderbilt University
- Location
- Los Angeles, CA + 2 other US sites
- Eligibility basics
- Ages 12–17
- RecruitingHealthy volunteers
Temporal Investigation of Multimodal Elements
Buck Institute for Research on Aging
- Location
- Novato, CA
- Eligibility basics
- Ages 55+
- RecruitingHealthy volunteers
Social Facilitation of Alcohol Effects and Alcohol Misuse in Young Adults
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 21–28
- RecruitingHealthy volunteers
The K-Map Study, Global Prevalence of KC
University Hospital, Geneva
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 6–23
- RecruitingHealthy volunteers
HEPA, PM2.5, and Cardiometabolic Health
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 65–84
- RecruitingHealthy volunteers
EyeConic: Qualification for Cone-Optogenetics
Institute of Molecular and Clinical Ophthalmology Basel
- Location
- San Francisco, CA + 2 other US sites
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Specialty Compared to Oncology Delivered Palliative Care for Patients With Acute Myeloid Leukemia
Massachusetts General Hospital
- Location
- Stanford, CA + 19 other US sites
- Eligibility basics
- Ages 18–120
- RecruitingHealthy volunteers
Validating Gulf War Illness Blood Biomarkers
Roskamp Institute Inc.
- Location
- Palo Alto, CA + 2 other US sites
- Eligibility basics
- Ages 35+
- RecruitingHealthy volunteers
Analysis of Headache Chronification With Imaging, Deep Phenotyping, and Proteomics
Stanford University
- Location
- Stanford, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Alzheimer Prevention Trials (APT) Webstudy
University of Southern California
- Location
- San Diego, CA
- Eligibility basics
- Ages 50–85
- RecruitingHealthy volunteers
Comparison of Methods for Recording Post Operative Pain
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Ketone Monoester Supplements, High Altitude, and Brain Blood Flow During Exercise
McMaster University
- Location
- Bishop, CA
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteers
Encoding Temporal Fine Structure for Cochlear Implants
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
TrialNet Pathway to Prevention of T1D
University of South Florida
- Location
- Orange, CA + 16 other US sites
- Eligibility basics
- Ages 2–45
- RecruitingHealthy volunteers
eMOTION: Examining Affective Mechanisms in Physical Activity Engagement
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Hair Biomarkers Study
Stanford University
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 6 mo–2
- RecruitingHealthy volunteers
Characterization of Inclusion Body Myopathy Associated With Paget's Disease of Bone and Frontotemporal Dementia (IBMPFD)
University of California, Irvine
- Location
- Irvine, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
The Family Perspectives Project Pilot Trial
Matthew Modes
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Empathy Through Pain Control: Lidocaine Paracervical Block for IUD Placements
University of California, San Diego
- Location
- La Jolla, CA
- Eligibility basics
- Ages 18–50 · Women only
- RecruitingHealthy volunteers
Demonstrating the Efficacy of a Spanish-Language Program for Latino Dementia Caregivers
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteersPhase 2
Valacyclovir in Pain Management of Acute Apical Abscesses
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteers
Brown Adipose Tissue Activity in Response to Semaglutide Administered to Obese Subjects.
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Family, Responsibility, Education, Support, and Health for Food Responsiveness
University of California, San Diego
- Location
- La Jolla, CA + 1 other US site
- Eligibility basics
- Ages 7–12
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.