Younger adults · California
Studies for younger adults in California
These studies accept adults from 21 or younger and set an upper age limit of 45 or below, so they are aimed at younger adults. Being in the age range does not mean you qualify; screening decides.
99 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- RecruitingHealthy volunteersPhase 1
Safety Study of MucoCept-CVN
Craig Cohen, MD, MPH
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteersPhase 1
The Effects of Dietary Supplementation on Serum Protein Glycosylation
University of California, Davis
- Location
- Sacramento, CA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteersEarly Phase 1
Biologic Therapy to Prevent Osteoarthritis After ACL Injury
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteersEarly Phase 1
Precision Dosing of Metformin in Youth With T2D
University of California, San Francisco
- Location
- Oakland, CA + 1 other US site
- Eligibility basics
- Ages 10–21
- RecruitingHealthy volunteersPhase 1
Azithromycin Before Induction
Arrowhead Regional Medical Center
- Location
- Colton, CA
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteersPhase 1
Treating Primary Sclerosing Cholangitis and Biliary Atresia With Vancomycin
Sacramento Pediatric Gastroenterology
- Location
- Sacramento, CA
- Eligibility basics
- Ages 0 mo–40
- RecruitingHealthy volunteers
Contraceptive Efficacy Study of Ovaprene
Daré Bioscience, Inc.
- Location
- Newhall, CA + 3 other US sites
- Eligibility basics
- Ages 18–40 · Women only
- RecruitingHealthy volunteersPhase 3
Fertilo In Vitro Research Study and Trial
Gameto, Inc.
- Location
- Clovis, CA + 15 other US sites
- Eligibility basics
- Ages 18–35 · Women only
- RecruitingHealthy volunteers
Women's Hormonal and Metabolic Wellbeing Study
Daily Nouri
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Establishing Normative Urodynamics Parameters for the Glean Urodynamics System in Healthy Adults
Bright Uro
- Location
- Tustin, CA + 2 other US sites
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Philips FAST SpO2 Technology With Masimo Sensors for SpO2 Monitoring in the Neonatal, Infant, and Pediatric Populations
Masimo Corporation
- Location
- Modesto, CA + 1 other US site
- Eligibility basics
- Ages 0 mo–21
- RecruitingHealthy volunteers
Effera Dose Response: Women's Health
Helaina Inc.
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–40 · Women only
- 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
- Recruiting
Evaluation of Orthokeratology Lenses With a 5MM Optic Zone Diameter
CooperVision International Limited (CVIL)
- Location
- Pleasanton, CA + 1 other US site
- Eligibility basics
- Ages 7–35
- RecruitingPhase 3
A Study to Investigate Efficacy and Safety of Teplizumab Compared With Placebo in Participants 1 to 25 Years of Age With Stage 3 Type 1 Diabetes
Sanofi
- Location
- San Diego, CA + 33 other US sites
- Eligibility basics
- Ages 1–25
- RecruitingPhase 2
SAFety and Efficacy of Human Anti-thymocyte ImmunoGlobUlin SAB-142 ARresting Progression of Type 1 Diabetes
SAb Biotherapeutics, Inc.
- Location
- San Francisco, CA + 20 other US sites
- Eligibility basics
- Ages 5–40
- RecruitingPhase 3
A Master Protocol (AMAZ): A Study of Mirikizumab (LY3074828) in Pediatric Participants With Ulcerative Colitis or Crohn's Disease (SHINE-ON)
Eli Lilly and Company
- Location
- San Francisco, CA + 8 other US sites
- Eligibility basics
- Ages 2–19
- RecruitingPhase 1
A Study to Assess Sulbactam-durlobactam in Pediatric Patients With Acinetobacter Baumannii-calcoaceticus Complex Infection
Innoviva Specialty Therapeutics
- Location
- Los Angeles, CA + 3 other US sites
- Eligibility basics
- Ages 0 mo–18
- RecruitingPhase 2
A Study to Investigate Mibavademab in Adult Women With Functional Hypothalamic Amenorrhea
Regeneron Pharmaceuticals
- Location
- West Hills, CA + 9 other US sites
- Eligibility basics
- Ages 18–40 · Women only
- RecruitingPhase 3
A Research Study on How Well Cagrilintide and CagriSema Work in Children and Adolescents With Excess Body Weight
Novo Nordisk A/S
- Location
- Escondido, CA + 26 other US sites
- Eligibility basics
- Ages 8–18
- RecruitingPhase 1
A Study of SGT-212 Gene Therapy in Friedreich's Ataxia
Solid Biosciences Inc.
- Location
- Los Angeles, CA + 2 other US sites
- Eligibility basics
- Ages 18–40
- RecruitingPhase 2
Study of MRM-3379 in Male Participants With Fragile X Syndrome (BLOOM)
Mirum Pharmaceuticals, Inc.
- Location
- Irvine, CA + 13 other US sites
- Eligibility basics
- Ages 13–45 · Men only
- RecruitingPhase 3
A Study of Nipocalimab in Pregnancies at Risk for Severe Hemolytic Disease of the Fetus and Newborn (HDFN)
Janssen Research & Development, LLC
- Location
- La Jolla, CA + 19 other US sites
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingPhase 3
A Study of Nipocalimab or Intravenous Immunoglobulin (IVIG) in Pregnancies At Risk of Fetal and Neonatal Alloimmune Thrombocytopenia (FNAIT)
Janssen Research & Development, LLC
- Location
- Sacramento, CA + 11 other US sites
- Eligibility basics
- Ages 18–45 · Women only