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
Development of a Mobile Health Intervention for Electronic Cigarette Use Among Young Adults
University of Chicago
- Location
- Chicago, IL
- Eligibility basics
- Ages 18–26
- RecruitingHealthy volunteers
Effect of Ashwagandha Root Extract on Stress, Anxiety, and Sleep Quality in Adults Experiencing Minority Stress
SF Research Institute, Inc.
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
A Pilot Study to Evaluate the Ability of Lactoferrin to Modulate Iron Homeostasis and Exercise Performance in Exercising Females
Lindenwood University
- Location
- Saint Charles, MO
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Ketogenic Diet and Brain Response in Anorexia Nervosa
University of California, San Diego
- Location
- San Diego, CA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Sodium vs Potassium Education to Improve Vascular Health
Florida State University
- Location
- Tallahassee, FL
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Collaborative Opportunities for Reducing Alcohol and Sexual Violence Together
State University of New York at Buffalo
- Location
- Buffalo, NY
- Eligibility basics
- Ages 18–24
- RecruitingHealthy volunteers
Motivations, Attitudes, and Perceptions Study
University of Nebraska Lincoln
- Location
- Lincoln, NE
- Eligibility basics
- Ages 18–25
- RecruitingHealthy volunteers
Tender Loving Care for Recurrent Pregnancy Loss
Walter Reed National Military Medical Center
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–44 · Women only
- RecruitingHealthy volunteers
Neural and Psychiatric Consequences of Cannabis Use in Adolescents
University of Miami
- Location
- Miami, FL
- Eligibility basics
- Ages 14–20
- RecruitingHealthy volunteers
Supraspinatus Tendon Acute Effects After Two Exercise Exposures: a Crossover Randomized Trial.
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Periaqueductal Gray-vagus Nerve Interface Malfunction Explain the Natural History With Its Numerous Co-morbidities?
Virginia Commonwealth University
- Location
- Richmond, VA
- Eligibility basics
- Ages 12–21 · Women only
- RecruitingHealthy volunteers
Avocado Consumption, Nutrients in Human Milk, and Infant Cognitive Development
University of North Carolina, Chapel Hill
- Location
- Kannapolis, NC
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
The Young Adults' Experiences With Virtual Reality (YAES VR) Study
NYU Langone Health
- Location
- New York, NY
- Eligibility basics
- Ages 18–24
- RecruitingHealthy volunteers
Synergistic Activity of Human Milk Nutrients and Infant Cognition
University of North Carolina, Chapel Hill
- Location
- Kannapolis, NC
- Eligibility basics
- Ages 4 mo–35
- RecruitingHealthy volunteers
The Effectiveness and Acceptability of Formal Versus Informal Mindful Self-Compassion for Adolescents
Cambridge Health Alliance
- Location
- Malden, MA
- Eligibility basics
- Ages 14–19
- RecruitingHealthy volunteers
Leg Heating in Pregnant Women With Obesity
University of Texas Southwestern Medical Center
- Location
- Dallas, TX
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Suicide Prevention for Substance Using Youth Experiencing Homelessness
Ohio State University
- Location
- Columbus, OH
- Eligibility basics
- Ages 15–24
- RecruitingHealthy volunteers
Use of Ketosis in Modulating Metabolic Pathways in Bipolar Disorder
Stony Brook University
- Location
- Belmont, MA + 1 other US site
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
The Effect of Sleep Loss on Emotion Regulation
Beth Israel Deaconess Medical Center
- Location
- Boston, MA
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Metabolic Adaptations to Weight Loss With and Without Exercise
University of Michigan
- Location
- Ann Arbor, MI
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Eye Recovery Automation for Post Injury Dysfunction (iRAPID)
New Jersey Institute of Technology
- Location
- Albuquerque, NM
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Mothers' Action Project for Child Health
University of Massachusetts, Worcester
- Location
- New York, NY
- Eligibility basics
- Ages 1–45
- RecruitingHealthy volunteers
PREnatal Choline and Infant Outcomes Study
East Carolina University
- Location
- Greenville, NC
- Eligibility basics
- Ages 18–40 · Women only
- RecruitingHealthy volunteers
Role of GABAergic Transmission in Auditory Processing in Autism Spectrum Disorder
National Institute of Mental Health (NIMH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 11–25
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.