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
Detection of EEG-Based Biomarkers of Chronic Low Back Pain
Stanford University
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteers
Variations in Ketone Metabolism
Ohio State University
- Location
- Novato, CA + 1 other US site
- Eligibility basics
- Ages 20–70
- RecruitingHealthy volunteers
Cardiac-Control Affecting Learning Through Mindfulness (CALM)
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 50–70
- RecruitingHealthy volunteers
Spatial Scene Recognition Memory in Epilepsy Surgery
University of California, Davis
- Location
- Sacramento, CA + 1 other US site
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteers
A Study to See if an iPhone Weight Management App Can Help Promote Weight Loss in Adolescents and Young Adults After a Stem Cell Transplant
Jonsson Comprehensive Cancer Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 13–30
- RecruitingHealthy volunteers
New Approach to Objectively Measure Social Engagement in Older Adults With Hearing Loss
University of Southern California
- Location
- Los Angeles, CA + 1 other US site
- Eligibility basics
- Ages 60+
- RecruitingHealthy volunteers
A Culturally Informed Patient Navigation Program (CFPN) to Reduce Delays Between Diagnosis and Treatment in American Indian and Alaska Native Cancer Patients Living in Rural California
University of Southern California
- Location
- Bishop, CA + 1 other US site
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Wayfinding Intervention and Long-Term Memory
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 60–85
- RecruitingHealthy volunteers
Positive Affect Treatment for Adolescents With Early Life Adversity
University of California, Irvine
- Location
- Irvine, CA
- Eligibility basics
- Ages 12–16
- RecruitingHealthy volunteers
Intermittent Fasting on Body Fat and Quality of Life
Loma Linda University
- Location
- Loma Linda, CA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 4
Regional Blocks for Lateral Condyle Fractures
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 4–12
- RecruitingHealthy volunteers
Telemedicine to Support Living Kidney Donor Candidates
University of California, Irvine
- Location
- Orange, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Clinical and Biological Characteristics of Hidradenitis Suppurativa
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 13+
- RecruitingHealthy volunteers
LPFC Organization in Emotion-Duration Difference Estimation
University of California, Santa Barbara
- Location
- Santa Barbara, CA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteersPhase 2
Regulation of Affect and Physiology in Depression
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–27
- RecruitingHealthy volunteers
The Use of Lymph Node Biopsies to Support HIV Pathogenesis Studies
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteersPhase 2
Effects of Cannabidiol and Tetrahydrocannabinol on Microbiome and Neuroinflammation in HIV
University of California, San Diego
- Location
- San Diego, CA
- Eligibility basics
- Ages 21–70
- RecruitingHealthy volunteers
Women Focused Encounters for Resilience Independence Strength and Eudaimonia
University of California, San Diego
- Location
- San Diego, CA
- Eligibility basics
- Ages 18+ · Women only
- RecruitingHealthy volunteers
Implementing Scalable, PAtient-centered, Team-based, Technology-enabled Care for Adults With Type 2 Diabetes (iPATH)
Stanford University
- Location
- Stanford, CA + 2 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Avoidance-driven Decision Making and Learning in Anorexia Nervosa and Bulimia Nervosa
University of California, San Diego
- Location
- La Jolla, CA
- Eligibility basics
- Ages 18–39 · Women only
- RecruitingHealthy volunteers
ACT Group for Family Caregivers of Stroke Survivors
The Wright Institute
- Location
- Alameda, CA
- Eligibility basics
- Ages 40+
- RecruitingHealthy volunteers
Bridge the Gap (BTG) - Black Youth Group
Children's Hospital Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 12–17
- RecruitingHealthy volunteers
Protocol for Collecting, Banking and Distributing Human Tissue Samples: St. Jude Children's Research Hospital Tissue Resources Core Facility
St. Jude Children's Research Hospital
- Location
- Palo Alto, CA + 12 other US sites
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Individual Cerebral Hemodynamic Oxygenation Relationships (ICHOR 1)
Children's Hospital Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Up to age 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.