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
Effects of Creatine Supplementation on Cognitive Measures and Markers of Acute Kidney Injury After Exercise in the Heat
University of Northern Iowa
- Location
- Cedar Falls, IA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Examining Lateralized Aspects of Motor Control Using Non-invasive Neural Stimulation
Virginia Commonwealth University
- Location
- Richmond, VA
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteersPhase 4
The Role of Heliox in Respiratory Control
Indiana University
- Location
- Bloomington, IN
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Postnatal Exercise to Activate Baby's Brown Fat
Joslin Diabetes Center
- Location
- Boston, MA + 1 other US site
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Testing the Effectiveness and Implementation of a Meditation App for Youth in the Legal System
University of Illinois at Chicago
- Location
- Chicago, IL
- Eligibility basics
- Ages 13–20
- RecruitingHealthy volunteers
Pediatric Normative Markerless Movement Analysis
MultiCare Health System Research Institute
- Location
- Puyallup, WA
- Eligibility basics
- Ages 3–25
- RecruitingHealthy volunteers
Mechanisms of Uterine Fluid Absorption During Early Pregnancy ( ELF Study)
Johns Hopkins University
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Non-invasive Vagus Nerve Stimulation (nVNS) and Cognition in Young Adult Vapers - A Pilot Study
Temple University
- Location
- Philadelphia, PA
- Eligibility basics
- Ages 18–25
- RecruitingHealthy volunteersPhase 4
The TEAM Study - Treatment Efficacy for Autism/Attention Using Mixed Amphetamine
Gagan Joshi
- Location
- Boston, MA
- Eligibility basics
- Ages 8–18
- RecruitingHealthy volunteers
Mechanisms Underlying the Protective Vascular Effects of Dietary Potassium in Humans
University of Delaware
- Location
- Newark, DE
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteersPhase 4
Effects of GH and Lirglutide on AgRP
Columbia University
- Location
- New York, NY
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Education and Employment Support for HIV Prevention in Young Adults (ENSPIRE)
University of North Carolina, Chapel Hill
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–24
- RecruitingHealthy volunteers
Using Novel Behavioral Economic Measures to Characterize Dual Marijuana and Tobacco Use in Young Adults
Brown University
- Location
- Providence, RI
- Eligibility basics
- Ages 18–25
- RecruitingHealthy volunteers
Metabolic Diet for Relapse Prevention in Anorexia Nervosa
Icahn School of Medicine at Mount Sinai
- Location
- New York, NY
- Eligibility basics
- Ages 18–40 · Women only
- RecruitingHealthy volunteers
NDPP-NextGen: A Clinical Trial to Reduce Intergenerational Obesity and Diabetes Risks
Wake Forest University Health Sciences
- Location
- Winston-Salem, NC
- Eligibility basics
- Ages 18–39 · Women only
- RecruitingHealthy volunteers
Mobile Application-based Exercise Intervention for Pregnant Women
Western Kentucky University
- Location
- Bowling Green, KY
- Eligibility basics
- Ages 18–44 · Women only
- RecruitingHealthy volunteers
MyPEEPS LITE Trial
Columbia University
- Location
- Chicago, IL + 1 other US site
- Eligibility basics
- Ages 16–29 · Men only
- RecruitingHealthy volunteers
Effect of Product Characteristics on the Abuse Liability of Nicotine Pouches
Emory University
- Location
- Atlanta, GA
- Eligibility basics
- Ages 21–35
- RecruitingHealthy volunteers
Mitigating Response to Stressors in Pregnant Women
Nova Southeastern University
- Location
- Davie, FL
- Eligibility basics
- Ages 21–37 · Women only
- RecruitingHealthy volunteers
A Reinforced Mindfulness-Based Intervention to Reduce Problematic Drinking Among Hispanic Emerging Adults
Florida International University
- Location
- Miami, FL
- Eligibility basics
- Ages 18–25
- RecruitingHealthy volunteers
High-Intensity Interval Exercise in Young Adult Survivors of Pediatric Brain Tumors: A Pilot Feasibility Study
Dana-Farber Cancer Institute
- Location
- Boston, MA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
The Effects of One Day of Activity on the Next Day's Exercise Response
Concordia University Wisconsin
- Location
- Mequon, WI
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteers
Effect of Dietary Nitrate on Immobilization-induced Changes in Skeletal Muscle in Young Healthy Men
Indiana University
- Location
- Indianapolis, IN
- Eligibility basics
- Ages 18–44 · Men only
- RecruitingHealthy volunteers
Triple EIT (Electrical Impedance Tomography)
University of Colorado, Denver
- Location
- Aurora, CO
- Eligibility basics
- Ages 0 mo–25
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.