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7,120 recruiting studies with US sites, from the official ClinicalTrials.gov registry (refreshed Oct 26, 2026). No sign-up needed.
Most recently updated studies · page 155 of 297
- RecruitingHealthy volunteers
DoubleTake: Effect of Message Exposure Via a Discrete Choice Experiment With Eye-Tracking on Quit Attempts Among Adults Who Smoke Menthol Cigarettes
Georgia State University
- Location
- Atlanta, GA
- Eligibility basics
- Ages 21+
- RecruitingHealthy volunteers
Protein Supplementation During Luteal Phase to Stop Protein Degradation
Sam Houston State University
- Location
- Conroe, TX
- Eligibility basics
- Ages 18–35 · Women only
- RecruitingHealthy volunteers
Adult and Juvenile Myositis
National Institute of Environmental Health Sciences (NIEHS)
- Location
- Bethesda, MD + 1 other US site
- Eligibility basics
- Ages 2–100
- RecruitingHealthy volunteers
Pennington Center Longitudinal Study (PCLS)
Pennington Biomedical Research Center
- Location
- Baton Rouge, LA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Peripheral Blood Mononuclear Cells Response In Healthy Controls, Heavy Drinkers, and Patients With Alcoholic Hepatitis
The Cleveland Clinic
- Location
- Cleveland, OH
- Eligibility basics
- Ages 21–65
- RecruitingHealthy volunteersPhase 2/Phase 3
Inhaled Isopropyl Alcohol for Treatment of Nausea
State University of New York at Buffalo
- Location
- Buffalo, NY
- Eligibility basics
- Ages 7–17
- RecruitingHealthy volunteers
Benefits of Nicotinamide Riboside Upon Cognition and Sleep
State University of New York at Buffalo
- Location
- Buffalo, NY
- Eligibility basics
- Ages 65–85
- RecruitingHealthy volunteers
Natural History of Inflammatory Muscle Diseases
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 2–120
- RecruitingHealthy volunteers
Latinx Children and Surgery
University of California, Irvine
- Location
- Orange, CA
- Eligibility basics
- Ages 2–12
- RecruitingHealthy volunteers
Pelvic Vein Quantitative Flow Characterization Using 2D and 4D Flow MRI
Ningcheng Peter Li
- Location
- Worcester, MA
- Eligibility basics
- Ages 18–89
- RecruitingHealthy volunteers
Comparison of Microbiome Changes in Healthy Adults Following Ketone Ester Consumption
University of California, San Francisco
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Comparison of Two Different Sperm Processing Methods and Their Effects on Sperm DNA Fragmentation and Embryo Development
Richard Kordus, PhD, HCLD (ABB)
- Location
- Greenville, SC
- Eligibility basics
- Ages 18–34
- RecruitingHealthy volunteers
Insomnia and Insulin Resistance
University of Missouri-Columbia
- Location
- Columbia, MO
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteersPhase 2
JAK Signaling in Depression and Cognition in Male Football Players
Emory University
- Location
- Atlanta, GA + 2 other US sites
- Eligibility basics
- Ages 30–55 · Men only
- RecruitingHealthy volunteers
Mobile Sun Health Intervention EnabLing Daily Protection
University of Utah
- Location
- Salt Lake City, UT
- Eligibility basics
- Ages 18–29
- RecruitingHealthy volunteers
Anchoring and Postural Stability
University of Central Florida
- Location
- Orlando, FL
- Eligibility basics
- Ages 18–50
- RecruitingHealthy volunteers
Greek Connections Study
University of Washington
- Location
- Seattle, WA
- Eligibility basics
- Ages 18–29
- RecruitingHealthy volunteers
Lower Body Negative Pressure to Validate Physiological Monitors
Mayo Clinic
- Location
- Rochester, MN
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteers
Dystonia Genotype-Phenotype Correlation
University of Texas Southwestern Medical Center
- Location
- Dallas, TX
- Eligibility basics
- Ages 11+
- RecruitingHealthy volunteers
Neurobiological Mechanisms of Aging and Stress on Prospective Navigation
Georgia Institute of Technology
- Location
- Atlanta, GA
- Eligibility basics
- Ages 65–80
- RecruitingHealthy volunteers
American Lung Association (ALA) Lung Health Cohort
Johns Hopkins University
- Location
- Birmingham, AL + 26 other US sites
- Eligibility basics
- Ages 25–35
- RecruitingHealthy volunteers
Combating Alzheimer's Through Sleep and Exercise
University of Miami
- Location
- Miami, FL
- Eligibility basics
- Ages 55–80
- RecruitingHealthy volunteers
Examining the Impact of Exercise Training on Vascular Dysfunction in Individuals With Mental Health Disorders - Study 1
Virginia Commonwealth University
- Location
- Richmond, VA
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteers
UCLA REST Study (REsearch on Sleep Techniques)
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–22
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