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7,114 recruiting studies with US sites, from the official ClinicalTrials.gov registry (refreshed Oct 27, 2026). No sign-up needed.
Most recently updated studies · page 25 of 297
- RecruitingHealthy volunteersEarly Phase 1
Insulin Regulation of Lipolysis and Lipolysis Proteins
Mayo Clinic
- Location
- Rochester, MN
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteersEarly Phase 1
Identification of Critical Thermal Environments for Aged Adults
Penn State University
- Location
- University Park, PA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersEarly Phase 1
Biologic Therapy to Prevent Osteoarthritis After ACL Injury
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteersPhase 1/Phase 2
Linaclotide for Colonoscopy Bowel Prep
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersOvernight stay mentioned
Nighttime Synchrony of Your Nutrition and Circadian Health
University of Utah
- Location
- Salt Lake City, UT
- Eligibility basics
- Ages 18–35
- RecruitingHealthy volunteersEarly Phase 1
PET Image in PAH Patients
Stephen Y. Chan
- Location
- Pittsburgh, PA
- Eligibility basics
- Ages 18–75
- RecruitingHealthy volunteersPhase 1
Home-based Vision Therapy
VA Office of Research and Development
- Location
- Cleveland, OH
- Eligibility basics
- Ages 18–80
- RecruitingHealthy volunteersPhase 1
Effect of Cannabis on Cigarette Use Behavior
Johns Hopkins University
- Location
- Baltimore, MD
- Eligibility basics
- Ages 21+
- RecruitingHealthy volunteersEarly Phase 1
Opioid-Sparing and Pain-Reducing Properties of Syntocinon: A Dose-Effect Determination
University of Florida
- Location
- Gainesville, FL
- Eligibility basics
- Ages 21–45
- RecruitingHealthy volunteersPhase 1/Phase 2
Curcumin and Retinal Study
Texas Tech University Health Sciences Center
- Location
- Lubbock, TX
- Eligibility basics
- Ages 40–89
- RecruitingHealthy volunteersEarly Phase 1
Assessment of Synaptic Density in MS
Brigham and Women's Hospital
- Location
- Boston, MA
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteersPhase 1
Oral Cannabidiol for Tobacco Cessation
Johns Hopkins University
- Location
- Baltimore, MD
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 1
Age-dependent Effects of Smoked and Oral Delta-9-THC
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 1
A Reduced-Intensity Conditioning Regimen (Cyclophosphamide, Pentostatin, Anti-thymocyte Globulin) Followed by Haploidentical Hematopoietic Stem Cell Transplant for the Treatment of Patients With Refractory or Recurrent…
City of Hope Medical Center
- Location
- Duarte, CA
- Eligibility basics
- Up to age 75
- RecruitingHealthy volunteersOvernight stay mentioned
Digital vs. Speculum Exams for PPROM
Washington University School of Medicine
- Location
- St Louis, MO
- Eligibility basics
- Any age listed · Women only
- RecruitingHealthy volunteersPhase 1
PET Imaging Study of 64Cu-GRIP B for Patients Receiving CD19-directed CAR-T Therapy
Michael Randall
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersEarly Phase 1
Researching Economical Adjuvants to Cancer Therapy
Florida State University
- Location
- Tallahassee, FL
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteersEarly Phase 1
Diffusion MRI in Heart Failure
Massachusetts General Hospital
- Location
- Charlestown, MA
- Eligibility basics
- Ages 18–85
- RecruitingHealthy volunteersEarly Phase 1
PET Imaging Evaluation of [11C]SY08
Massachusetts General Hospital
- Location
- Charlestown, MA
- Eligibility basics
- Ages 50–80
- RecruitingHealthy volunteersEarly Phase 1
Precision Dosing of Metformin in Youth With T2D
University of California, San Francisco
- Location
- Oakland, CA + 1 other US site
- Eligibility basics
- Ages 10–21
- RecruitingHealthy volunteersEarly Phase 1
Cardiometabolic Benefit of Reducing Iatrogenic Hyperinsulinemia Using Insulin Adjunctive Therapy in Type 1 Diabetes
Vanderbilt University Medical Center
- Location
- Nashville, TN
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteersEarly Phase 1
RM1 Project 1 - tAN Naloxone
Medical University of South Carolina
- Location
- Charleston, SC
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteersPhase 1
THC and CBD: A Controlled Human Study Probing a Harm Reduction Strategy
University of California, Los Angeles
- Location
- Los Angeles, CA
- Eligibility basics
- Ages 21–55
- RecruitingHealthy volunteersPhase 1
The Impact of Gestational Diabetes Mellitus on Cerebral Blood Flow and Cerebrovascular Function After Pregnancy
Anna Stanhewicz, PhD
- Location
- Iowa City, IA
- Eligibility basics
- Ages 18–50 · Women only
Data source: daily sync of the ClinicalTrials.gov API. How we list studies