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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 142 of 297
- RecruitingHealthy volunteers
Familial Mediterranean Fever and Related Disorders: Genetics and Disease Characteristics
National Human Genome Research Institute (NHGRI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 2 mo–115
- RecruitingHealthy volunteers
Recruitment and Apheresis Collection of Peripheral Blood Hematopoietic Stem Cells, Mononuclear Cells and Granulocytes
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–70
- RecruitingHealthy volunteers
MRI Study of Musculoskeletal Function
National Institutes of Health Clinical Center (CC)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 5–95
- RecruitingHealthy volunteers
Cytapheresis of Volunteer Donors
National Institute on Aging (NIA)
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–120
- RecruitingHealthy volunteers
Long-term Evaluation and Follow-up Care of Patients Treated With Stem Cell Transplants
National Heart, Lung, and Blood Institute (NHLBI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 7–80
- RecruitingHealthy volunteers
MRS Measurement of Glutamate and GABA Metabolism in Brain
National Institute of Mental Health (NIMH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Molecular Basis of Human Phagocyte Interactions With Bacterial Pathogens
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Hamilton, MT
- Eligibility basics
- Ages 18–120
- RecruitingHealthy volunteers
Diagnosis and Treatment of Patients With Inborn Errors of Metabolism
National Human Genome Research Institute (NHGRI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 1 mo–115
- RecruitingHealthy volunteers
Collection and Analysis of Blood, Bone Marrow, and Buccal Mucosa Samples From Healthy Volunteers
National Heart, Lung, and Blood Institute (NHLBI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 8–99
- RecruitingHealthy volunteers
Collection of Lung Fluid and Tissue Samples for Research
National Heart, Lung, and Blood Institute (NHLBI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 5–100
- RecruitingHealthy volunteers
Studies of Skin Microbes in Healthy People and in People With Skin Conditions
National Human Genome Research Institute (NHGRI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 2–100
- RecruitingHealthy volunteers
Characterization of Patients With Uncommon Presentations and/or Uncommon Diseases Associated With the Cardiovascular System
National Heart, Lung, and Blood Institute (NHLBI)
- Location
- Washington D.C., DC + 1 other US site
- Eligibility basics
- Ages 1–100
- RecruitingHealthy volunteers
Admission and Management of Occupational or Other Exposures to Biodefense/Bioterrorism Agents or to Epidemic/Emerging Infectious Diseases
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 3–99
- RecruitingHealthy volunteers
Development of 3T Magnetic Resonance Research Methods for NIA Studies
National Institute on Aging (NIA)
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–99
- RecruitingHealthy volunteers
Thinking and Memory Problems in People With HIV
National Institute of Neurological Disorders and Stroke (NINDS)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 18–110
- RecruitingHealthy volunteers
Natural History Study of GATA2 Deficiency and Related Disorders
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 2–100
- RecruitingHealthy volunteers
Heart Health Study in Washington D.C. to Develop a Community-Based Behavioral Weight Loss Intervention
National Heart, Lung, and Blood Institute (NHLBI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 19–85
- RecruitingHealthy volunteers
Genetic and Epigenetic Signatures of Translational Aging Laboratory Testing (GESTALT)
National Institute on Aging (NIA)
- Location
- Baltimore, MD
- Eligibility basics
- Ages 20–120
- RecruitingHealthy volunteers
Children s Growth and Behavior Study
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 8–100
- RecruitingHealthy volunteers
Natural History and Genetics of Food Allergy and Related Conditions
National Institute of Allergy and Infectious Diseases (NIAID)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 0 mo–99
- RecruitingHealthy volunteers
Clinical and Scientific Assessment of Pain and Painful Disorders
National Center for Complementary and Integrative Health (NCCIH)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 12–120
- RecruitingHealthy volunteers
Non-Invasive Respiratory Monitor
Nemours Children's Clinic
- Location
- Wilmington, DE
- Eligibility basics
- Ages 11–17
- RecruitingHealthy volunteers
Tailoring Mobile Health Technology to Reduce Obesity and Improve Cardiovascular Health in Resource-Limited Neighborhood Environments
National Heart, Lung, and Blood Institute (NHLBI)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 21–75 · Women only
- RecruitingHealthy volunteers
Clinical and Molecular Characteristics of Primary Aldosteronism in Blacks
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- Location
- Bethesda, MD
- Eligibility basics
- Ages 7–70
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