Location · California
Clinical trials recruiting in California
1898 recruiting studies have at least one site in California; 701 accept healthy volunteers. Studies that need a specific condition are included too, so check each listing.
Want the research companies that run paid Phase 1 studies for healthy volunteers? Paid clinical trial companies in California.
1,898 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
More recruiting studies (pay not posted)
- RecruitingHealthy volunteers
Study of Student Flourishing
Flourish Science, Inc.
- Location
- Berkeley, CA + 5 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Comparison of Transforming Powder Dressing to NPIAP Recommended Standard of Care Therapies in Stage 2, 3 and 4 Pressure Injuries
ULURU Inc.
- Location
- San Diego, CA + 12 other US sites
- Eligibility basics
- Ages 18–85
- RecruitingHealthy volunteersPhase 4
Acute Partial Thickness Burn Study Comparing Transforming Powder Dressing to Standard of Care Dressing
ULURU Inc.
- Location
- Orange, CA + 5 other US sites
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Prevention of Cervical Cancer Using the Genotyping Screening and Same-day Self-sampling
Atila Biosystems Inc.
- Location
- Sunnyvale, CA
- Eligibility basics
- Ages 30–64 · Women only
- RecruitingHealthy volunteers
A Prospective Registry to Enable Collection of Standardized Routine Care Oncology Patient Data
N-Power Medicine
- Location
- Monterey, CA + 6 other US sites
- Eligibility basics
- Ages 18–120
- RecruitingHealthy volunteers
MindRhythm Detection of Concussion and Recovery Study
MindRhythm, Inc.
- Location
- Cupertino, CA
- Eligibility basics
- Ages 4+
- RecruitingHealthy volunteers
In Vivo Cross-Modal Imaging of Skin
Gabriel Sanchez
- Location
- Mountain View, CA
- Eligibility basics
- Ages 2–90
- RecruitingHealthy volunteers
The Mitopure Challenge to Detect Levels of Urolithin A in Dried Blood Spots
Amazentis SA
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteers
Paired Non-inferiority Study Comparing Overture Semi-automated Vitrification System ("DaVitri") to Standard Manual Process for Clinical Pregnancy Outcomes
Overture Life
- Location
- Novato, CA
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
A Randomized, Double Blind, Placebo Controlled, Clinical Study to Examine the Benefits of an Oral Product in Panelists With Menopausal Symptoms Including Vasomotor Symptoms (VMS).
Olly, PBC
- Location
- San Francisco, CA
- Eligibility basics
- Ages 40–65 · Women only
- RecruitingHealthy volunteers
Pilot Study of the Entarik System With Advanced Functionality in Health Adults
Gravitas Medical, Inc.
- Location
- Berkeley, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Computerized Tests of Cognitive Decline in Presymptomatic Alzheimer's Disease
Neurobehavioral Systems, Inc.
- Location
- Berkeley, CA
- Eligibility basics
- Ages 18–89
- RecruitingHealthy volunteers
Treatment to Lift Facial Lax Skin and Improve Facial Wrinkles Using Precise and Lift Applicators
Sofwave Medical LTD
- Location
- La Mesa, CA + 1 other US site
- Eligibility basics
- Ages 35–80
- RecruitingHealthy volunteersPhase 2
Thymus Regeneration, Immunorestoration, and Insulin Mitigation Extension Trial
Intervene Immune, Inc.
- Location
- Torrance, CA
- Eligibility basics
- Ages 40–80
- RecruitingHealthy volunteers
Prospective Study on Power Prenatal Vitamins for Males on YO Score At-home Sperm Test Results
The Bird and Be Co Inc
- Location
- Encino, CA
- Eligibility basics
- Ages 18–50 · Men only
- RecruitingHealthy volunteers
Prospective Study of oncRNA Stratification of Cancer by Size and Stage
Exai Bio Inc.
- Location
- Palo Alto, CA + 1 other US site
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Therapeutic Effects of Electrical Vestibular Stimulation (EVS) on Balance and Gait
Neursantys Inc
- Location
- Cupertino, CA + 1 other US site
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteers
Kesimpta (Ofatumumab) Pregnancy Registry
Novartis Pharmaceuticals
- Location
- La Jolla, CA
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteersPhase 3
Safety and Efficacy of Brilaroxazine (RP5063) in Schizophrenia
Reviva Pharmaceuticals
- Location
- Garden Grove, CA + 16 other US sites
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Urine Metabolites in the Diagnosis of Disease
Luventix, Inc.
- Location
- Encinitas, CA + 3 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Controlled Desaturation Study for Perin Health Patch Validation
Perin Health Devices
- Location
- Woodland Hills, CA
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteers
Post-Authorization Safety Study for Assessment of Pregnancy Outcomes in Patients Treated With Mayzent
Novartis Pharmaceuticals
- Location
- La Jolla, CA
- Eligibility basics
- Any age listed · Women only
- RecruitingHealthy volunteersPhase 2
Dose Regimen Study of SLI-F06 in Healthy Volunteers
Scarless Laboratories, Inc.
- Location
- Encinitas, CA + 1 other US site
- Eligibility basics
- Ages 18–65
- Recruiting
Assessment of CCM in HF With Higher Ejection Fraction
Impulse Dynamics
- Location
- La Jolla, CA + 64 other US sites
- Eligibility basics
- Ages 18+