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
Improving Colonoscopy Surveillance for Patients With High Risk Colon Polyps
Jonsson Comprehensive Cancer Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 21+
- RecruitingHealthy volunteers
Language Control Across Modalities
University of California, San Diego
- Location
- San Diego, CA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Utilizing Advocates and Supporters to Increase Lung Cancer Screening Rates in Eligible Participants
Jonsson Comprehensive Cancer Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 40–80
- RecruitingHealthy volunteers
Virtual Reality Interventions for the Improvement of Depression, Anxiety and Pain in Patients With Head and Neck Cancer and Caregivers
City of Hope Medical Center
- Location
- Duarte, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Mirai-MRI: Validation of AI Models for Breast Cancer Risk
University of California, San Francisco
- Location
- San Francisco, CA + 1 other US site
- Eligibility basics
- Ages 40–89 · Women only
- RecruitingHealthy volunteers
Preparedness Through Respiratory Virus Epidemiology and Community Engagement
University of California, San Diego
- Location
- La Jolla, CA + 1 other US site
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
eMOTION: Examining Implicit Attitudes in Physical Activity Engagement
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Visible Abdominal Distension
Hospital Universitari Vall d'Hebron Research Institute
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteersPhase 4
Anticoagulation Profile in Pregnant Women Treated With Three Times a Day of Low Molecular Weight Heparin (LMWH)
University of California, Irvine
- Location
- Orange, CA
- Eligibility basics
- Ages 18+ · Women only
- RecruitingHealthy volunteers
Diagnostic Innovations in Glaucoma Study
University of California, San Diego
- Location
- La Jolla, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
SPL Insufficiency Syndrome (SPLIS)/NPHS14: a SPLIS Observational Study and Patient Registry (International)
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
The Effects of Energy Healing in Fibromyalgia
University of California, Irvine
- Location
- Irvine, CA
- Eligibility basics
- Ages 18–75 · Women only
- RecruitingHealthy volunteers
Neurophysiologic Biomarkers in Rett Syndrome
Children's Hospital of Philadelphia
- Location
- Los Angeles, CA + 5 other US sites
- Eligibility basics
- Ages 1–18 · Women only
- RecruitingHealthy volunteers
Effects of KSM-66 Ashwagandha® (300 mg) on Skin and Hair Health in Healthy Men and Women"
SF Research Institute, Inc.
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteers
Neurophysiologic Biomarkers for Cognitive Rehabilitation
VA Office of Research and Development
- Location
- San Diego, CA
- Eligibility basics
- Ages 18–75
- RecruitingHealthy volunteers
A Research Study Exploring How Musculoskeletal Function and the Autonomic Nervous System Relate to Visceral Pain in Women With and Without Dysmenorrhea (Painful Periods).
Azusa Pacific University
- Location
- Azusa, CA
- Eligibility basics
- Ages 18–35 · Women only
- RecruitingHealthy volunteers
Sensory Adapted Dental Environments to Enhance Oral Care for Children With and Without Dental Fear and Anxiety
University of Southern California
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 6–12
- RecruitingHealthy volunteers
Novel Multimodal Neural, Physiological, and Behavioral Sensing and Machine Learning for Mental States
University of Southern California
- Location
- Downey, CA + 1 other US site
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
A Study to Evaluate Community-Based Measures to Increase RSV Vaccine Use Among Latino Adults
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Somatic Dysfunction in Patients With Acute Cerebrovascular Disease
University of California, Davis
- Location
- Sacramento, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
An Evaluation of the Pink Cloud Application in Post- Treatment Substance Use Disorder Support
Loyola Marymount University
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Impact of Aerosol Box Use During Cardiopulmonary Arrest: A Multicenter Study
KidSIM Simulation Program
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteers
Motivational Wellness Coaching to Reduce Childhood Obesity in Families and Kids
Kaiser Permanente
- Location
- Pasadena, CA
- Eligibility basics
- Ages 2–8
- RecruitingHealthy volunteers
Immediate Postpartum Glucose Tolerance Testing
MemorialCare Health System
- Location
- Long Beach, CA
- Eligibility basics
- Ages 18+ · Women 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.