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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 149 of 297
- RecruitingHealthy volunteers
Advancing Precision Nutrition: Wearable Technology for Noninvasive Insulin Monitoring
Texas A&M University
- Location
- College Station, TX
- Eligibility basics
- Ages 18–90
- RecruitingHealthy volunteers
Role of Theta Frequency Oscillations in Proactive and Reactive Control Processes in Youth With Attention Deficit Hyperactivity Disorder (ADHD) and Obsessive Compulsive Disorder (OCD)
National Institute of Mental Health (NIMH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 10–17
- RecruitingHealthy volunteers
NASA Exercise Prebreathe Study
Duke University
- Location
- Durham, NC
- Eligibility basics
- Ages 30–60
- RecruitingHealthy volunteers
A Trial to Examine the Effects of a Weight Loss Program Emphasizing Protein, Dietary Fiber, and Exercise (30-30-30 Plan)
Midwest Center for Metabolic and Cardiovascular Research
- Location
- Addison, IL + 2 other US sites
- Eligibility basics
- Ages 18–69
- RecruitingHealthy volunteers
Evaluation of a Decision-Support Tool for Blood Biomarker Testing for Alzheimer's Disease in Primary Care
University of Wisconsin, Madison
- Location
- Madison, WI
- Eligibility basics
- Ages 50+
- RecruitingHealthy volunteers
Supporting Health Through Alcohol Reduction and Relationship Enhancement Together
Brown University
- Location
- Providence, RI
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
The Use of Risk Prediction to Identify Patients at Risk for Chronic Kidney Disease: Patient and Provider Interventions for Patients at High Risk for Chronic Kidney Disease
Kaiser Permanente
- Location
- Portland, OR
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteers
Supplementation of Cholecalciferol and Related Active Metabolites Through Bioenhancing Layer's Eggs
Cornell University
- Location
- Ithaca, NY
- Eligibility basics
- Ages 18–40
- RecruitingHealthy volunteers
Human Movement Database
National Institutes of Health Clinical Center (CC)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 1 mo–99
- RecruitingHealthy volunteers
Evaluation of Patients With Mood and Anxiety Disorders and Healthy Volunteers
National Institute of Mental Health (NIMH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 3–99
- RecruitingHealthy volunteers
Clinical, Laboratory, and Epidemiologic Characterization of Individuals and Families at High Risk of Melanoma
National Cancer Institute (NCI)
- Location
- Bethesda, MD + 1 other US site
- Eligibility basics
- Ages 1 mo–99
- RecruitingHealthy volunteers
Tissue Procurement for Biomedical Research
National Institute on Aging (NIA)
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–99
- RecruitingHealthy volunteers
Natural History of Bronchiectasis
National Heart, Lung, and Blood Institute (NHLBI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 5–100
- RecruitingHealthy volunteersPhase 4
Improving White Blood Cell Collection From Healthy Donors
National Institutes of Health Clinical Center (CC)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–75
- RecruitingHealthy volunteers
Genetic Characterization of Movement Disorders and Dementias
National Institute on Aging (NIA)
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–120
- RecruitingHealthy volunteers
Natural History, Pathogenesis and Outcome of Melorheostosis A Rare Osteosclerotic Disease
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–90
- RecruitingHealthy volunteers
Photoacoustic Imaging of the Breast in Patients With Breast Cancer and Healthy Subjects
Roswell Park Cancer Institute
- Location
- Buffalo, NY
- Eligibility basics
- Ages 18+ · Women only
- RecruitingHealthy volunteers
Collection of Human Biospecimens for Basic and Clinical Research Into Globin Variants
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteers
Clinical, Genetic, and Epidemiologic Study of Children and Adults With RASopathies
National Cancer Institute (NCI)
- Location
- Bethesda, MD + 1 other US site
- Eligibility basics
- Ages 1 mo–99
- RecruitingHealthy volunteers
Efficacy of mHealth Apps for Health in a Low-income, Type II Diabetic, Hispanic Population
San Diego State University
- Location
- San Diego, CA
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteers
Collecting Blood Samples From Patients With and Without Cancer to Evaluate Tests for Early Cancer Detection
Alliance for Clinical Trials in Oncology
- Location
- Anchorage, AK + 612 other US sites
- Eligibility basics
- Ages 40–75
- RecruitingHealthy volunteers
Exercise in Child Health
University of California, Irvine
- Location
- Irvine, CA
- Eligibility basics
- Ages 10–17
- RecruitingHealthy volunteers
Efficacy of Using Mobile Health Applications for Health
San Diego State University
- Location
- San Diego, CA
- Eligibility basics
- Ages 18–64
- RecruitingHealthy volunteers
State-dependent Interoception, Value-based Decision-making, and Introspection
National Institute of Mental Health (NIMH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–55
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