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
mTBI Identification and Monitoring Through Retinal Scanning
Rebiscan, Inc.
- Location
- Boston, MA
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Effera Dose Response: Women's Health
Helaina Inc.
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–40 · Women only
- RecruitingHealthy volunteers
MiREA-AC for Reducing Problematic Alcohol and Marijuana Use in College Students
mHealth Systems Inc.
- Location
- Charlotte, NC + 1 other US site
- Eligibility basics
- Ages 18–26
- RecruitingHealthy volunteers
Scalable Intervention for Stress Management
Livotion, LLC
- Location
- West Lafayette, IN
- Eligibility basics
- Ages 18–30
- RecruitingHealthy volunteers
The Effect Cranberry-Based Products on the Female Microbiome
Ocean Spray Cranberries, Inc.
- Location
- Chicago, IL
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Paired Non-inferiority Study Comparing Overture Semi-automated Vitrification System ("DaVitri") to Standard Manual Process for Clinical Pregnancy Outcomes
Overture Life
- Location
- Novato, CA
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingHealthy volunteers
Postprandial Response to Fruit Juice
Ocean Spray Cranberries, Inc.
- Location
- Addison, IL
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Effects of Effera Human Lactoferrin at One Dose Compared to Placebo on Gut Permeability
Helaina Inc.
- Location
- Addison, IL
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
The Effect of Vicia Faba Hydrolysate Supplementation on Muscle Strength Recovery
PepsiCo Global R&D
- Location
- Bradenton, FL
- Eligibility basics
- Ages 18–45
- RecruitingPhase 3
A Study to See if Tolvaptan is Safe in Infants and Children Who at Enrollment Are 28 Days to Less Than 18 Years Old With Autosomal Recessive Polycystic Kidney Disease (ARPKD)
Otsuka Pharmaceutical Development & Commercialization, Inc.
- Location
- Washington D.C., DC + 5 other US sites
- Eligibility basics
- Ages 1 mo–18
- Recruiting
Evaluation of Orthokeratology Lenses With a 5MM Optic Zone Diameter
CooperVision International Limited (CVIL)
- Location
- Pleasanton, CA + 1 other US site
- Eligibility basics
- Ages 7–35
- Recruiting
Delivering tAN to Reduce HMB: The LUNA Study
Spark Biomedical, Inc.
- Location
- Boston, MA
- Eligibility basics
- Ages 14–45 · Women only
- RecruitingPhase 3
A Research Study to See How Much CagriSema Lowers Blood Sugar and Body Weight Compared to Placebo in Children and Adolescents With Type 2 Diabetes
Novo Nordisk A/S
- Location
- Boynton Beach, FL + 13 other US sites
- Eligibility basics
- Ages 10–18
- RecruitingPhase 3
Pharmacokinetics, Safety, and Tolerability Study of GOPRELTO® Nasal Solution and NUMBRINO™ Nasal Solution
LXO Ireland
- Location
- Columbia, SC + 1 other US site
- Eligibility basics
- Ages 12–18
- RecruitingPhase 2
Effect of FB301 on Vaginal Bacterial Profile in Women With Asymptomatic Vaginal Dysbiosis Undergoing a Mock Frozen Embryo Transfer Cycle
Freya Biosciences ApS
- Location
- Wichita, KS + 2 other US sites
- Eligibility basics
- Ages 18–45 · Women only
- RecruitingPhase 3
A Phase 3 Study of Fenfluramine Hydrochloride in Rett Syndrome
UCB BIOSCIENCES, Inc.
- Location
- Little Rock, AR + 7 other US sites
- Eligibility basics
- Ages 5–35
- RecruitingPhase 2
A Study to Investigate the Safety, Tolerability, Pharmacokinetics, and Clinical Activity of ABS-1230 in Pediatric and Young Adult Participants With KCNT1-related Epilepsy
Actio Biosciences, Inc.
- Location
- Hackensack, NJ
- Eligibility basics
- Ages 1 mo–21
- RecruitingPhase 3
A Study to Investigate Efficacy and Safety of Teplizumab Compared With Placebo in Participants 1 to 25 Years of Age With Stage 3 Type 1 Diabetes
Sanofi
- Location
- Scottsdale, AZ + 33 other US sites
- Eligibility basics
- Ages 1–25
- RecruitingPhase 2
SAFety and Efficacy of Human Anti-thymocyte ImmunoGlobUlin SAB-142 ARresting Progression of Type 1 Diabetes
SAb Biotherapeutics, Inc.
- Location
- San Francisco, CA + 20 other US sites
- Eligibility basics
- Ages 5–40
- RecruitingPhase 3
A Study to Evaluate the Efficacy and Safety of Subcutaneous Nomlabofusp in Subjects With Friedreich's Ataxia
Larimar Therapeutics, Inc.
- Location
- Chicago, IL + 2 other US sites
- Eligibility basics
- Ages 12–40
- RecruitingPhase 3
A Study of Baricitinib (LY3009104) for the Delay of Stage 3 Type 1 Diabetes in At-Risk Children and Adults
Eli Lilly and Company
- Location
- Tallahassee, FL + 3 other US sites
- Eligibility basics
- Ages 1–35
- RecruitingPhase 3
A Study of Baricitinib (LY3009104) to Preserve Beta Cell Function in Children and Adults Newly Diagnosed With Type 1 Diabetes (BARICADE-PRESERVE)
Eli Lilly and Company
- Location
- Aurora, CO + 3 other US sites
- Eligibility basics
- Ages 1–35
- RecruitingPhase 3
A Master Protocol (AMAZ): A Study of Mirikizumab (LY3074828) in Pediatric Participants With Ulcerative Colitis or Crohn's Disease (SHINE-ON)
Eli Lilly and Company
- Location
- San Francisco, CA + 8 other US sites
- Eligibility basics
- Ages 2–19
- RecruitingPhase 1
A Study to Assess Sulbactam-durlobactam in Pediatric Patients With Acinetobacter Baumannii-calcoaceticus Complex Infection
Innoviva Specialty Therapeutics
- Location
- Los Angeles, CA + 3 other US sites
- Eligibility basics
- Ages 0 mo–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.