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 volunteersPhase 2/Phase 3
Single Nuclei RNA-seq to Map Adipose Cellular Populations and Senescent Cells in Older Subjects
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Access to Genetic Testing in Underserved Patients With Cancer
University of Southern California
- Location
- Los Angeles, CA + 1 other US site
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
The THRIVE Study: Teaching Healthy Regulation in Individuals & Vulnerable Environments
University of California, Irvine
- Location
- Irvine, CA
- Eligibility basics
- Ages 11–14
- RecruitingHealthy volunteers
Understanding Allergies and Sensitizations in Healthy and Allergic Individuals
Stanford University
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 0 mo–90
- RecruitingHealthy volunteers
Virtual Reality for ICU Delirium Prevention
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Sleep Well Firefighters: An App-based Program to Improve Sleep, Cognition, and Behavioral Health in Firefighters
California Polytechnic State University-San Luis Obispo
- Location
- San Luis Obispo, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 4
Safety of RSV Preventive Monoclonal Antibody
Duke University
- Location
- Oakland, CA + 4 other US sites
- Eligibility basics
- Ages 1 mo–7 mo
- RecruitingHealthy volunteers
Treatment of Ocular Discomfort in Glaucoma Patients Using Multiple Topical Medications
University of California, Los Angeles
- Location
- Fountain Valley, CA
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Risk Assessment Evaluation for Identifying Participants at High Risk for Stomach Cancer
City of Hope Medical Center
- Location
- Duarte, CA
- Eligibility basics
- Ages 40–80
- RecruitingHealthy volunteersPhase 2
Effect of Novel Exhalational Delivery System With Fluticasone (EDS-FLU) on Eustachian Tube Dysfunction (ETD)
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA + 3 other US sites
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteersPhase 2/Phase 3
Using Navigation to Improve Accuracy of Maxillary Balloon Sinusotomy
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Transcutaneous Spinal Cord Stimulation for Chronic Low Back Pain
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 21–85
- RecruitingHealthy volunteersPhase 4
TReating Incontinence for Underlying Mental and Physical Health
University of California, San Francisco
- Location
- Palo Alto, CA + 1 other US site
- Eligibility basics
- Ages 60+ · Women only
- RecruitingHealthy volunteers
Students Rising Above: Offsetting the Health and Mental Health Costs of Resilience
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 13+
- RecruitingHealthy volunteers
Fructose Intestinal Gluconeogenesis
Touro University, California
- Location
- Vallejo, CA
- Eligibility basics
- Ages 20–55
- RecruitingHealthy volunteers
Chronic Infections and Inflammation in ME/CFS: An Observational Study
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Enhancing Capacity in Churches to Implement PA Programs
San Diego State University
- Location
- San Diego, CA
- Eligibility basics
- Ages 18–65 · Women only
- RecruitingHealthy volunteers
Telephone-based Physical Activity Coaching or Self Monitored Physical Activity to Improve Physical Function in Older Adults Who Are Undergoing Surgery for Lung Cancer and Their Caregivers
City of Hope Medical Center
- Location
- Davis, CA + 15 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Testing & Refinement of CarePair: An Assessment and Referral Platform to Support Family Caregivers of Alzheimer's Disease and Related Dementias.
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Evaluating AI-Generated Plain Language Summaries on Patient Comprehension of Ophthalmology Notes Among English-Speaking Patients
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Brain Stimulation to the Hippocampus in Schizophrenia
Stanford University
- Location
- Stanford, CA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Digital vs. Parent Modeled Toothbrushing
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 3–6
- RecruitingHealthy volunteers
Parent-Mediated Intervention Targeting Insistence on Sameness for Autistic Children
Stanford University
- Location
- Stanford, CA
- Eligibility basics
- Ages 6–11
- RecruitingHealthy volunteers
Multidisciplinary Low-Barrier and Mobile HIV Care to Improve Retention and Viral Suppression: Stakeholder-Engaged Design and Evaluation
University of California, San Francisco
- Location
- Oakland, CA + 4 other US sites
- Eligibility basics
- Ages 15+
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.