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
Feasibility and Acceptability of Mindful Self-Compassion Among Transgender and Nonbinary Young Adults
University of Rhode Island
- Location
- Providence, RI
- Eligibility basics
- Ages 18–29
- RecruitingHealthy volunteers
WeCare: A System of Care for Black Youth
New York University
- Location
- New York, NY
- Eligibility basics
- Ages 12–19
- RecruitingHealthy volunteers
Neurobehavioral Signatures of Sign- and Goal-Tracking in Emerging Adults: Translation of a Preclinical Model
University of Michigan
- Location
- Ann Arbor, MI
- Eligibility basics
- Ages 18–22
- RecruitingHealthy volunteers
Gait Adaptation and Biofeedback for Cerebral Palsy
University of Washington
- Location
- Saint Paul, MN
- Eligibility basics
- Ages 7–18
- RecruitingHealthy volunteers
Developing and Testing Health Warning Labels on the ENDS Device
Florida International University
- Location
- Miami, FL
- Eligibility basics
- Ages 21–35
- RecruitingHealthy volunteers
Smart Symptom Tracking ALEX Application for Tracking and Monitoring Gastrointestinal Health, Smart Horizons Pilot Trial
Mayo Clinic
- Location
- Jacksonville, FL
- Eligibility basics
- Ages 18–44
- RecruitingHealthy volunteers
Pregnancy Exercise Mode Effect on Childhood Obesity
East Carolina University
- Location
- Greenville, NC
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Restoring Spindle and Thalamocortical Efficiency in Early-Course Schizophrenia Patients Using Auditory Stimulation
Fabio Ferrarelli
- Location
- Pittsburgh, PA
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Aquagenic Wrinkling Prediction
University of Iowa
- Location
- Iowa City, IA
- Eligibility basics
- Ages 18–24
- RecruitingHealthy volunteers
Facilitating Lactation Through Optimized Workflows - Evaluating the Efficiency of Pumping Protocols and Cellular Mechanisms of Milk Production
University of Rochester
- Location
- Rochester, NY
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Functional Ovarian Reserve in Sickle Cell Disease
St. Jude Children's Research Hospital
- Location
- Memphis, TN
- Eligibility basics
- Ages 10–18 · Women only
- RecruitingHealthy volunteers
Pre- and Post-neuromusculoskeletal Injury Risk Evaluation for Return-to-Duty Enhancement
Womack Army Medical Center
- Location
- Bethesda, MD + 1 other US site
- Eligibility basics
- Ages 18–44
- RecruitingHealthy volunteers
Quantifying Uterine Elastography in Menstruating Women
Reproductive Medicine Associates of New Jersey
- Location
- Basking Ridge, NJ
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Brain Health in Transgender Adults
University of Wisconsin, Madison
- Location
- Madison, WI
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteersPhase 4
Etonogestrel (ENG) Implant Insertion for Emergency Contraception With Oral Levonorgestrel (LNG) vs Placebo
Lori Gawron
- Location
- Salt Lake City, UT
- Eligibility basics
- Ages 18–35 · Women only
- RecruitingHealthy volunteers
Exploring Virtual Reality Adventure Training Exergaming
The University of Texas at Arlington
- Location
- Arlington, TX
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Unilateral M1 Anodal tDCS to Enhance Learning in a Gross Movement Videogame Task
Indiana University
- Location
- Indianapolis, IN
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
rTMS Induced Reduction in M1 Excitability
Indiana University
- Location
- Indianapolis, IN
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Investigating the Effects of Beef Consumption on Cognitive and Brain Health
University of Nebraska Lincoln
- Location
- Lincoln, NE
- Eligibility basics
- Ages 19–24
- RecruitingHealthy volunteers
Acute Pharmacokinetics of Create Wellness Gummies in Healthy Adults
University of Oklahoma
- Location
- Norman, OK
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Sleep and Performance
University of Washington
- Location
- Seattle, WA
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteers
Virtual Reality Visual Field Testing as an Alternative in Childhood Eye Disease
Duke University
- Location
- Durham, NC
- Eligibility basics
- Ages 4–21
- RecruitingHealthy volunteers
Omega-3 Fatty Acids as Regulators of Brown Adipose Tissue During Cold Exposure
Indiana University
- Location
- Bloomington, IN
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Comparing Two School-Based Sleep Health Interventions To Promote Sleep Quality in Youth
Children's Hospital Los Angeles
- Location
- Los Angeles, CA + 1 other US site
- Eligibility basics
- Ages 12–18
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.