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 4
Iron Deficiency Anemia (IDA) and the Brain
Children's Hospital Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 16–60 · Women only
- RecruitingHealthy volunteers
An Evaluation of LASIK, SMILE and PRK Surgery in Physicians
Stanford University
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 21–62
- RecruitingHealthy volunteers
Blood Flow Restriction Training on Upper Extremity Grip Strength
Casa Colina Hospital and Centers for Healthcare
- Location
- Pomona, CA
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteers
Molecular Optimization Via Exercise (MOVE)
Buck Institute for Research on Aging
- Location
- Novato, CA
- Eligibility basics
- Ages 65–80
- RecruitingHealthy volunteersPhase 2
PrEPsmart 2-1-1 Pilot
Public Health Foundation Enterprises, Inc.
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
Next Generation Chest X-Ray Tomosynthesis for Screening of Lung Cancer
University of California, San Diego
- Location
- San Diego, CA
- Eligibility basics
- Ages 30–85
- RecruitingHealthy volunteers
Liquid Biopsies in Pediatric Solid Tumors
Children's Hospital Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 6 mo+
- RecruitingHealthy volunteers
Research Framework Exploring Sleep Health
Scripps Translational Science Institute
- Location
- La Jolla, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Effectiveness of Dual Light Electric Toothbrush vs. Manual Toothbrush in Orthodontic Patients Undergoing Oral Surgery
Children's Hospital Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 6–20
- RecruitingHealthy volunteers
Wound Irrigation Comparative Effectiveness Study
Orthopaedic Education and Research Institute (dba Hoag Orthopedics)
- Location
- Orange, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
POWERMOM, A Healthy Pregnancy Research Community
Scripps Translational Science Institute
- Location
- La Jolla, CA
- Eligibility basics
- Ages 16+ · Women only
- RecruitingHealthy volunteers
MyGeneRank: A Digital Platform for Next-Generation Genetic Studies
Scripps Translational Science Institute
- Location
- La Jolla, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Comparing the Stanford Letter Project Form to Traditional Advance Directives
Stanford University
- Location
- Stanford, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
An Adaptive Clinical Trial of BeginNGS Newborn Screening for Hundreds of Genetic Diseases by Genome Sequencing
Rady Pediatric Genomics & Systems Medicine Institute
- Location
- San Diego, CA
- Eligibility basics
- Ages 0 mo–1 mo
- RecruitingHealthy volunteers
Enroll -HD: A Prospective Registry Study in a Global Huntington's Disease Cohort
CHDI Foundation, Inc.
- Location
- Irvine, CA + 51 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Focal Therapy for Localized Prostate Cancer
University of California, San Diego
- Location
- La Jolla, CA
- Eligibility basics
- Ages 18+ · Men only
- RecruitingHealthy volunteers
Use of Continuous Glucose Monitors in Children and Adolescents With Obesity
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 10–21
- RecruitingHealthy volunteers
MS-ResearchBiomarkerS
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Evaluating the Impact of Training for IHSS Workers
Abdul Latif Jameel Poverty Action Lab
- Location
- San Bernardino, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Capsule Microbiota Sampling in IBS/Functional Gastrointestinal Disease
Stanford University
- Location
- Redwood City, CA
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteers
Achieving Steady Work Among Adults With Autism Through Specialized Employment Program
Lawrence Fung
- Location
- Palo Alto, CA
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteers
Site and Mechanism(s) of Expiratory Airflow Limitation in COPD, Emphysema and Asthma-COPD Overlap
Gelb, Arthur F., M.D.
- Location
- Lakewood, CA
- Eligibility basics
- Ages 30+
- RecruitingHealthy volunteers
Adherence to Different Exercise Interventions
California Polytechnic State University-San Luis Obispo
- Location
- San Luis Obispo, CA
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Cardiac Magnetic Resonance Imaging (MRI) Normal Reference Control Group Testing
Cedars-Sinai Medical Center
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 35–65 · 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.