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
Cardiac Structure and Function in MPS
Children's Hospital of Orange County
- Location
- Orange, CA + 1 other US site
- Eligibility basics
- Ages 0 mo–99
- RecruitingHealthy volunteers
Geriatric Assessment and Management for Older Adults Undergoing Chemotherapy and Radiation Therapy for Head and Neck Cancer and Their Family Caregivers
City of Hope Medical Center
- Location
- Duarte, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Environmental Exposure Assessment in High-Risk and Early-Onset Breast Cancer Care
City of Hope Medical Center
- Location
- Duarte, CA
- Eligibility basics
- Ages 18+ · Women only
- RecruitingHealthy volunteers
Using Nicotine to Reverse Age-related Auditory Processing Deficits
University of California, Irvine
- Location
- Irvine, CA + 1 other US site
- Eligibility basics
- Ages 18–85
- RecruitingHealthy volunteersPhase 3
Basal Cell Carcinoma Chemoprevention Trial
VA Office of Research and Development
- Location
- San Diego, CA + 5 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
A SMART Evaluation of an Adaptive Web-based AUD Treatment for Service Members and Their Partners
Stanford University
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Very Brief Exposure: Development of a Novel Exposure Modality for Social Anxiety Disorder in Transition-Age Youth
Children's Hospital Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 16–22
- RecruitingHealthy volunteers
Natural History Evaluation of Charcot Marie Tooth Disease (CMT) Types CMT1B, CMT2A, CMT4A, CMT4C, and Others
Michael Shy
- Location
- Los Angeles, CA + 17 other US sites
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Genetics of Charcot Marie Tooth (CMT) - Modifiers of CMT1A, New Causes of CMT2
University of Iowa
- Location
- Los Angeles, CA + 17 other US sites
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Clinical and Genetic Evaluation of Individuals With Undiagnosed Disorders Through the Undiagnosed Diseases Network
National Human Genome Research Institute (NHGRI)
- Location
- Los Angeles, CA + 23 other US sites
- Eligibility basics
- Ages 1 mo–100
- RecruitingHealthy volunteers
Cognitive Aftereffects of Neurotoxicity in Children and Young Adults With Relapsed/Refractory Hematologic Malignancies Who Receive CAR T-cell Therapy
National Cancer Institute (NCI)
- Location
- Los Angeles, CA + 2 other US sites
- Eligibility basics
- Ages 5+
- RecruitingHealthy volunteers
Provider-Mediated Communication of Genetic Testing Results to At-Risk Relatives of Cancer Patients to Improve Genetic Counseling and Testing Rates, Family HOPE Study
City of Hope Medical Center
- Location
- Duarte, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Prospective Registry of ADC as First- and Second-line Treatment for Breast Cancer
University of California, San Francisco
- Location
- San Francisco, CA + 2 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Linking Youth to Pre-Exposure Prophylaxis (PrEP) Services
Westat
- Location
- San Francisco, CA + 3 other US sites
- Eligibility basics
- Ages 13–24
- RecruitingHealthy volunteers
Preventing School Exclusion and Opioid Misuse: Effectiveness of the Inclusive Skill-building Learning Approach (ISLA)
University of Oregon
- Location
- Capitola, CA + 2 other US sites
- Eligibility basics
- Ages 8–15
- RecruitingHealthy volunteers
UCLA Magnesium Formulation Athlete Study
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteersPhase 2
Ongoing Lung Decline With Age Intensified Response
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 60+
- RecruitingHealthy volunteers
Effect of Messaging on Pragmatic Outcomes Within an Integrated Healthcare System
Kaiser Permanente
- Location
- Pasadena, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Pulse Oximeter Accuracy in Healthy Humans During Hypoxia
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteers
Glaucoma Screening to Enhance At-Risk Californians' Health
University of California, San Francisco
- Location
- Fremont, CA + 1 other US site
- Eligibility basics
- Ages 50+
- RecruitingHealthy volunteers
Nutrition for Precision Health, Powered by the All of Us
RTI International
- Location
- Davis, CA + 12 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Research on Equity in Abortion Care by TeleHealth
University of California, San Francisco
- Location
- Oakland, CA
- Eligibility basics
- Ages 14–64
- RecruitingHealthy volunteers
K08 VR Fear Conditioning
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteers
Combatting HIV Or Other STIs Early (CHOOSE)
Westat
- Location
- San Francisco, CA + 5 other US sites
- Eligibility basics
- Ages 13–24 · Men only
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.