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7,114 recruiting studies with US sites, from the official ClinicalTrials.gov registry (refreshed Oct 28, 2026). No sign-up needed.
Most recently updated studies · page 31 of 297
- RecruitingHealthy volunteers
Impact of Two Iron Formulations on Iron Biomarkers and Quality of Life
Qualia Life Sciences
- Location
- Carlsbad, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 3
Lot-to-lot Consistency Study of a 21-valent Pneumococcal Conjugate Vaccine in Healthy Infants From 2 Months of Age
Sanofi
- Location
- Fayetteville, AR + 13 other US sites
- Eligibility basics
- Ages 1 mo–2 mo
- RecruitingHealthy volunteers
Efficacy of Qualia Testosterone+ on Testosterone Levels in Adult Males
Qualia Life Sciences
- Location
- Carlsbad, CA
- Eligibility basics
- Ages 28–65 · Men only
- RecruitingHealthy volunteers
The Impact of Qualia Vitamin C+ on Individuals With Suboptimal and Adequate Vitamin C Levels
Qualia Life Sciences
- Location
- Carlsbad, CA
- Eligibility basics
- Ages 25–75
- RecruitingHealthy volunteers
Positron Emission Tomography/Computed Tomography (PECT/CT) Double-Scanning Study
GE Healthcare
- Location
- Stanford, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
A Study to Assess Deucravacitinib Safety in Pregnancy
Bristol-Myers Squibb
- Location
- La Jolla, CA
- Eligibility basics
- Any age listed · Women only
- RecruitingHealthy volunteers
Observational Study of Decentralized Urine Optical Interaction Patterns Associated With Environmental Microplastic and Nanoplastic Exposure
Ecotera Health LLC
- Location
- Birmingham, AL + 50 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Comparison of ACUVUE® OASYS MAX 1-Day Multifocal and DAILIES® AquaComfort Plus® Multifocal
Johnson & Johnson Vision Care, Inc.
- Location
- Roswell, GA + 9 other US sites
- Eligibility basics
- Ages 40–70
- RecruitingHealthy volunteers
Evaluation of Approved Contact Lenses (CR-6657)
Johnson & Johnson Vision Care, Inc.
- Location
- Franklin Park, IL + 3 other US sites
- Eligibility basics
- Ages 18–39
- RecruitingHealthy volunteers
The Effects of Daily Supplementation of a Soluble Fiber on the Fecal Microbiota in Volunteers.
Roquette Freres
- Location
- Addison, IL
- Eligibility basics
- Ages 18–60
- RecruitingHealthy volunteers
A Randomized Comparison of Stage-Based Care Versus Risk Factor-Based Care for Prevention of Cardiovascular Events
Cleerly, Inc.
- Location
- Chandler, AZ + 121 other US sites
- Eligibility basics
- Ages 55+
- RecruitingHealthy volunteersPhase 3
A Study of COVID-19 Vaccine(s) in Children and Adults
BioNTech SE
- Location
- Homestead, FL + 13 other US sites
- Eligibility basics
- Ages 5+
- RecruitingHealthy volunteers
Pivotal Trial for an Automated AI-based System for Detection of Diabetic Retinopathy
Digital Diagnostics, Inc.
- Location
- Jacksonville, FL
- Eligibility basics
- Ages 22+
- RecruitingHealthy volunteers
Multi-strain Probiotic Supplement for Digestive Comfort and Well-being in Healthy Women
Daily Nouri
- Location
- San Francisco, CA
- Eligibility basics
- Ages 25–45 · Women only
- RecruitingHealthy volunteersPhase 2
Safety and Efficacy of wSp Vaccine in Young Children
Serum Life Science Europe GmbH
- Location
- Pittsford, NY + 3 other US sites
- Eligibility basics
- Ages 5 mo–7 mo
- RecruitingHealthy volunteers
Singula Phase 0.1 Primary Care Pilot
Singula Health, Inc.
- Location
- Mount Kisco, NY
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 2
A Recovery and Lifespan Study Using INTERCEPT Red Blood Cells Prepared Using the INTERCEPT Blood System for RBCs With AS-1
Cerus Corporation
- Location
- Norfolk, VA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Wearable Photoplethysmography for Non-invasive Hydration Assessment
PepsiCo Global R&D
- Location
- Frisco, TX + 1 other US site
- Eligibility basics
- Ages 18–45
- RecruitingHealthy volunteers
Hydration & Female Life Stages
PepsiCo Global R&D
- Location
- Bradenton, FL + 1 other US site
- Eligibility basics
- Ages 18–60 · Women only
- RecruitingHealthy volunteers
Dozee Validation for Contactless Heart Rate and Respiration Monitoring in Clinical Settings
Turtle Shell Technologies Pvt. Ltd.
- Location
- Lake Jackson, TX
- Eligibility basics
- Ages 22–100
- RecruitingHealthy volunteers
The Effects of Tyrosol and Creatine on Exercise Performance and Cognition in Healthy Adults
Applied Science & Performance Institute
- Location
- Tampa, FL
- Eligibility basics
- Ages 20–55 · Men only
- RecruitingHealthy volunteers
Identifying Patterns in the Breath of Individuals With Breast Cancer
Breathe BioMedical Inc
- Location
- Washington D.C., DC + 2 other US sites
- Eligibility basics
- Ages 40–74 · Women only
- RecruitingHealthy volunteersPhase 3
A Study on the Efficacy of a Vaccine Against Influenza in Adults ≥65 Years of Age
GlaxoSmithKline
- Location
- Anniston, AL + 130 other US sites
- Eligibility basics
- Ages 65+
- RecruitingHealthy volunteers
An Open-Label, Two-Arm Pilot Study of the Tolerability, Consumer Acceptability, and Exploratory Well-Being Outcomes of a Multi-Ingredient Protein Formula in Two Flavors in Healthy Adults
Qualia Life Sciences
- Location
- Carlsbad, CA
- Eligibility basics
- Ages 21–65
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