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 volunteersPhase 4
ANCHORS Alcohol & Sexual Health Study: UH3 Project
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 18–30 · Men only
- RecruitingHealthy volunteers
TrialNet Pathway to Prevention of T1D
University of South Florida
- Location
- Orange, CA + 16 other US sites
- Eligibility basics
- Ages 2–45
- RecruitingHealthy volunteers
Glycemic/Insulinemic Effects of Fresh Mango as a Sugar Substitute in Realistic Breakfasts.
Ball State University
- Location
- Muncie, IN
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
The Impact of Acute Exercise in the Heat on Breast Milk Production and Composition in Lactating Women
Providence College
- Location
- Providence, RI
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Effects of Vestibular Training on Postural Control of Healthy Adults Using Virtual Reality
Clarkson University
- Location
- Potsdam, NY
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteersPhase 2
Involving Communities in Addressing the Maternal Health Crisis: Making an IMPACT
Morehouse School of Medicine
- Location
- Atlanta, GA
- Eligibility basics
- Ages 18–44
- RecruitingHealthy volunteers
Transcranial Electrical Stimulation (TES) at Slow Oscillation (SO) Frequency During NREM Sleep
U.S. Army Medical Research and Development Command
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–39
- RecruitingHealthy volunteers
Diet-Induced Changes in GEnetic Material
Pennington Biomedical Research Center
- Location
- Baton Rouge, LA
- Eligibility basics
- Ages 20–35 · Men only
- RecruitingHealthy volunteers
Drinking in Young Adult Duos (DYAD) Study
Carnegie Mellon University
- Location
- Pittsburgh, PA
- Eligibility basics
- Ages 21–30
- RecruitingHealthy volunteers
Comparing Two Eccentric Protocols on Muscle Damage
New York Institute of Technology
- Location
- Old Westbury, NY
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteers
Vascular Function and Oxidative Stress in Emergency Medical Responders
University of Delaware
- Location
- Newark, DE
- Eligibility basics
- Ages 20–40
- RecruitingHealthy volunteers
Teen Mom Study Feasibility Trial
University of Mississippi Medical Center
- Location
- Jackson, MS
- Eligibility basics
- Ages 15–19 · Women only
- RecruitingHealthy volunteers
A Mobile Gaming App to Improve Adherence to PrEP
Rhode Island Hospital
- Location
- Boston, MA + 2 other US sites
- Eligibility basics
- Ages 15–34
- RecruitingHealthy volunteers
Effect of Labetalol, Atenolol, and Nifedipine on Maternal Hemodynamics Measured by ICG in Early Pregnancy
Marshall University
- Location
- Huntington, WV
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Mindfulness Application Effects on Mental Health Symptoms in Children With Severe Tinnitus and Misophonia
University of Colorado, Denver
- Location
- Aurora, CO
- Eligibility basics
- Ages 10–18
- RecruitingHealthy volunteers
TRAC-ER Intervention to Reduce Risky Alcohol Use and HIV Risk
University of Kentucky
- Location
- New Haven, CT + 1 other US site
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteersPhase 4
Intravenous Iron Effects on Performance at High Altitude
United States Army Research Institute of Environmental Medicine
- Location
- Natick, MA
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Galactagogue Use in Lactating Women With Low Milk Supply
Winthrop University
- Location
- Rock Hill, SC
- Eligibility basics
- Ages 18–40 · Women only
- RecruitingHealthy volunteers
Trauma and Cardiometabolic Health in an American Indian Community
Montana State University
- Location
- Browning, MT
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteersPhase 4
Treatment to Regress to Normoglycemia in Women with a Recent History of GDM
Woman's
- Location
- Baton Rouge, LA
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Core Semantic Systems TMS
University of South Carolina
- Location
- Columbia, SC
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Target ADHD Executive Working Memory Replication Study
Hartford Hospital
- Location
- Hartford, CT
- Eligibility basics
- Ages 12–18
- RecruitingHealthy volunteers
Potassium, Hydration, Cardiovascular, and Kidney Study (PHACKs)
Auburn University
- Location
- Auburn, AL
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteers
Lifestyle Intervention for Healthy Change
Augusta University
- Location
- Augusta, GA
- Eligibility basics
- Ages 18–40
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.