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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 153 of 297
- RecruitingHealthy volunteers
Building Community Living Labs in Black Communities to Advance Prostate Health Equity and Reduce Prostate Cancer Disparities in Black Men
Mayo Clinic
- Location
- Jacksonville, FL
- Eligibility basics
- Ages 21–80
- RecruitingHealthy volunteers
Does a Periaqueductal Gray-vagus Nerve Interface Malfunction Explain the Nat hx With Its Numerous Co-morbidities?
Virginia Commonwealth University
- Location
- Richmond, VA
- Eligibility basics
- Ages 12–21 · Women only
- RecruitingHealthy volunteers
Teen Health Choices & Wellness
Brown University
- Location
- Providence, RI
- Eligibility basics
- Ages 13–16
- RecruitingHealthy volunteers
SBIR/ STTR Family Check-up Online
University of Oregon
- Location
- Eugene, OR
- Eligibility basics
- Any age listed
- RecruitingHealthy volunteers
Dairy Choline Bioavailability
University of Wisconsin, Madison
- Location
- Madison, WI
- Eligibility basics
- Ages 51–70 · Women only
- RecruitingHealthy volunteersPhase 2
Pregnenolone as a Treatment for Cannabis Intoxication
Johns Hopkins University
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 2
Acute Effects of Cannabis on Cognition and Affect
Washington State University
- Location
- Pullman, WA
- Eligibility basics
- Ages 21+
- RecruitingHealthy volunteers
Acute Mental Fatigue and Muscle Strength
Florida Institute for Human and Machine Cognition
- Location
- Pensacola, FL
- Eligibility basics
- Ages 18–39
- RecruitingHealthy volunteers
Heat Therapy During Reduced Physical Activity
Brigham Young University
- Location
- Provo, UT
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Natural History, Management, and Genetics of the Hyperimmunoglobulin E Recurrent Infection Syndrome (HIES)
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 1 mo–120
- RecruitingHealthy volunteers
Apheresis and Specimen Collection Procedures to Obtain Plasma, Peripheral Blood Mononuclear Cells (PBMCs) and Other Specimens for Research Studies
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 3+
- RecruitingHealthy volunteers
Immune Cell Response to Stimuli
National Institute of Environmental Health Sciences (NIEHS)
- Location
- Research Triangle Park, NC
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Physical and Behavioral Traits of Overweight and Obese Adults
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteersPhase 2
Effects of Treatments on Atopic Dermatitis
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 2–50
- RecruitingHealthy volunteers
Evaluation of Adults With Endocrine and Metabolic-Related Conditions
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteers
Technical Development of Cardiovascular Magnetic Resonance Imaging (CMR) Using a Low Specific Absorption Rate (SAR) Scanner System
National Heart, Lung, and Blood Institute (NHLBI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–100
- RecruitingHealthy volunteers
Liver X Receptor (LXR) as a Novel Therapeutic Target in Diabetic Retinopathy (DR)
University of Alabama at Birmingham
- Location
- Birmingham, AL
- Eligibility basics
- Ages 21–98
- RecruitingHealthy volunteers
Older Breast Cancer Patients: Risk for Cognitive Decline
Georgetown University
- Location
- Washington D.C., DC
- Eligibility basics
- Ages 60–105 · Women only
- RecruitingHealthy volunteers
Disease Modifying Potential of 5mg of Melatonin on Cognition and Brain Health in Aging
Natalie Denburg
- Location
- Iowa City, IA
- Eligibility basics
- Ages 56–85
- RecruitingHealthy volunteers
Deceased Uterine Transplant in Absolute Uterine Infertility (AUIF)
Brigham and Women's Hospital
- Location
- Boston, MA
- Eligibility basics
- Ages 18–40 · Women only
- RecruitingHealthy volunteers
Obstructive Sleep Apnea Among Somali-Americans
Mayo Clinic
- Location
- Rochester, MN
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Neural Correlates of Real World Spatial Navigation in Humans
Duke University
- Location
- Los Angeles, CA + 1 other US site
- Eligibility basics
- Ages 18–90
- RecruitingHealthy volunteers
Improving Spatial Perception and Speech Understanding in Multitalker Mixtures
Boston University Charles River Campus
- Location
- Boston, MA
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteers
Evaluation of the Acceptability, Appropriateness, and Feasibility/Usability of a Metastatic Breast-cancer Specific Prognostic Calculator Among Clinicians
UNC Lineberger Comprehensive Cancer Center
- Location
- Chapel Hill, NC
- Eligibility basics
- Any age listed
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