Who can join
Studies for younger adults
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.
674 recruiting studiesSource: ClinicalTrials.gov, refreshed October 26, 2026How we list studies
Studies
- RecruitingHealthy volunteers
Momentary Coping Prompts and Hair Steroids in College Students
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 18–22
- RecruitingHealthy volunteers
Just-in-Time Coping Prompts for Reactive Digital Behavior in College Students
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 18–22
- RecruitingHealthy volunteers
Overlapping Pain Trajectory Study
Children's Hospital Medical Center, Cincinnati
- Location
- Cincinnati, OH
- Eligibility basics
- Ages 10–19
- RecruitingHealthy volunteers
Preventing Depression of Chinese American Adolescents by RRE
Northeastern University
- Location
- Boston, MA
- Eligibility basics
- Ages 14–18
- RecruitingHealthy volunteers
The Effects of Auditory Stimulation During Sleep on Brain Networks in Schizophrenia
Massachusetts General Hospital
- Location
- Charlestown, MA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Quantifying Motor Network Dynamics to Predict and Enhance Outcomes in Pediatric Dystonia
Children's Hospital Medical Center, Cincinnati
- Location
- Cincinnati, OH
- Eligibility basics
- Ages 6–21
- RecruitingHealthy volunteers
Feasibility and Acceptability of Remote Saliva Collection
St. Jude Children's Research Hospital
- Location
- Memphis, TN
- Eligibility basics
- Ages 8–18
- RecruitingHealthy volunteers
The Influence of 3D Printed Prostheses on Neural Activation Patterns
University of Nebraska
- Location
- Omaha, NE
- Eligibility basics
- Ages 3–18
- RecruitingHealthy volunteers
Very Brief Exposure: Development of a Novel Exposure Modality for Social Anxiety Disorder in Transition-Age Youth
Children's Hospital Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 16–22
- RecruitingHealthy volunteers
Cannabis Association With Sleep Study
Oregon Health and Science University
- Location
- Portland, OR
- Eligibility basics
- Ages 21–29
- RecruitingHealthy volunteers
Serum Biomarkers to Characterize the Effects of Therapy on Ovarian Reserve in Premenopausal Women With Early-stage Breast Cancer or BRCA Mutations
Memorial Sloan Kettering Cancer Center
- Location
- Basking Ridge, NJ + 6 other US sites
- Eligibility basics
- Ages 18–44 · Women only
- RecruitingHealthy volunteers
Effects of Kinesio Tape on Delayed Onset Muscle Soreness
Indiana University
- Location
- Indianapolis, IN
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteers
Food and Circadian Timing
Oregon Health and Science University
- Location
- Portland, OR
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Tasting Plant Forward Meals
Sara Maksi
- Location
- Lexington, KY
- Eligibility basics
- Ages 18–25
- RecruitingHealthy volunteers
Linking Youth to Pre-Exposure Prophylaxis (PrEP) Services
Westat
- Location
- San Francisco, CA + 3 other US sites
- Eligibility basics
- Ages 13–24
- RecruitingHealthy volunteers
Feasibility Study of the Flash-Sole: A Wearable Midsole With Soft Actuators for Walking Assistance
University of Nebraska
- Location
- Omaha, NE
- Eligibility basics
- Ages 19–45
- RecruitingHealthy volunteers
Understanding Metabolism and Inflammation Risks for Diabetes in Adolescents
University of Michigan
- Location
- Ann Arbor, MI
- Eligibility basics
- Ages 14–18
- RecruitingHealthy volunteers
Restoration of Consciousness With Ultrasonic Deep Brain Stimulation During Anesthetic Sedation
University of Michigan
- Location
- Ann Arbor, MI
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
UCLA Magnesium Formulation Athlete Study
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteers
Sensor Ankle Brace for Special Operations Rehabilitation
Indiana University
- Location
- Bloomington, IN
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Rigorous Evaluation of the READY to Stand Curriculum to Prevent the Commercial Sexual Exploitation of Children
University of Michigan
- Location
- Des Moines, IA
- Eligibility basics
- Ages 13–19
- RecruitingHealthy volunteersPhase 4
Anterior Femoral and Adductor Canal Nerve Blocks in Peds Knees
Hospital for Special Surgery, New York
- Location
- New York, NY
- Eligibility basics
- Ages 8–18
- RecruitingHealthy volunteers
Interactive Roles of Cardiorespiratory Fitness and Adiposity on Glucose and Vascular Control After Physical Inactivity
Miami University
- Location
- Oxford, OH
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Combatting HIV Or Other STIs Early (CHOOSE)
Westat
- Location
- San Francisco, CA + 5 other US sites
- Eligibility basics
- Ages 13–24 · Men only
Questions
If I fit this group, will I qualify?
Not necessarily. Age and sex limits are only the first filter. Each study has its own inclusion and exclusion criteria, and the research team decides at screening.
Where do these age and sex limits come from?
From the eligibility section of each study’s official ClinicalTrials.gov record. We don’t infer eligibility from anything else.