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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 38 of 297
- RecruitingHealthy volunteers
Data Gathering for A10900
Optos, PLC
- Location
- Anaheim, CA + 2 other US sites
- Eligibility basics
- Ages 22+
- RecruitingHealthy volunteers
Autologous Hair Follicle Secretome for Androgenic Alopecia (Single Site)
Acorn Biolabs Inc.
- Location
- West Hollywood, CA
- Eligibility basics
- Ages 18–65
- RecruitingHealthy volunteers
Evaluation of Gut-Related Well-Being and Mood Effects of a Daily Nutritional Food Ingredient From the Co-Fermentation of Fungal Mycelium (Pleurotus Pulmonarius) and Microalgae (Chlorella Vulgaris)
Koralo GmbH
- Location
- San Francisco, CA
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Evaluate the Continued Safety and Performance of the Foot and Ankle Products
Arthrex, Inc.
- Location
- Sacramento, CA + 2 other US sites
- Eligibility basics
- Ages 2+
- RecruitingHealthy volunteers
Impact of Help-Seeking Behaviors on Allergic Rhinitis and Mental Health: A Longitudinal Study
QHSLab, Inc.
- Location
- West Palm Beach, FL
- Eligibility basics
- Ages 4–100
- RecruitingHealthy volunteers
The Effects of a Nutritional Supplement on Sleep Quality
Athletic Greens International
- Location
- Santa Monica, CA
- Eligibility basics
- Ages 35–65
- RecruitingHealthy volunteers
Specimens for Lung Cancer Panel Design
Maverix Medical
- Location
- Phoenix, AZ
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteersPhase 2
Effects of NLS-133, a Potential Non-Hormonal "On-Demand" Male Contraceptive
Next Life Sciences
- Location
- Seattle, WA
- Eligibility basics
- Ages 18–55 · Men only
- RecruitingHealthy volunteers
Molecular Indicators of Systematic Fitness
VO Health, Inc.
- Location
- New Haven, CT
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Self-balancing Personal Exoskeleton for SCI (Site 2)
Wandercraft
- Location
- West Orange, NJ
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Self-balancing Personal Exoskeleton for SCI (WINY)
Wandercraft
- Location
- New York, NY
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
A Study to Evaluate the Effects of a Supplement on the Side Effects Associated With Stimulant Medications
Outliers, Inc.
- Location
- Las Vegas, NV
- Eligibility basics
- Ages 18–55
- RecruitingHealthy volunteers
Royal Ancient Oats™ Study
Standard Process Inc.
- Location
- Kannapolis, NC
- Eligibility basics
- Ages 35–65
- RecruitingHealthy volunteers
Caris Biorepository Research Protocol
Caris Science, Inc.
- Location
- Mobile, AL + 37 other US sites
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
cfDNA Assay Prospective Observational Validation for Early Cancer Detection and Minimal Residual Disease
Adela, Inc
- Location
- Duarte, CA + 15 other US sites
- Eligibility basics
- Ages 40+
- RecruitingHealthy volunteers
MiREA-AC for Reducing Problematic Alcohol and Marijuana Use in College Students
mHealth Systems Inc.
- Location
- Charlotte, NC + 1 other US site
- Eligibility basics
- Ages 18–26
- RecruitingHealthy volunteers
Thermoacoustic Method for Estimating Liver Fat Fraction
Endra Lifesciences
- Location
- Ann Arbor, MI
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
Accuracy Evaluation of the Owlet OSS 3.0-M1 Sensor in Toddlers and Preschoolers
Owlet Baby Care, Inc.
- Location
- San Francisco, CA
- Eligibility basics
- Ages 1–5
- RecruitingHealthy volunteers
Clinical Study to Evaluate the Improvement in Hair Loss in Skin of Color Treated With Fractional Non-Ablative Laser
Lumenis Be Ltd.
- Location
- New York, NY
- Eligibility basics
- Ages 21–55
- RecruitingHealthy volunteers
Abuse Liability for Five Modern Oral Nicotine Products
RAI Services Company
- Location
- Overland Park, KS
- Eligibility basics
- Ages 21–60
- RecruitingHealthy volunteers
Collection of Samples From the United States Population for Optimization and Evaluation of Colorectal Cancer (CRC) Plasma Circulating Free-DNA (cfDNA) Marker Panel Performance
Universal Diagnostics
- Location
- Lake Barrington, IL
- Eligibility basics
- Ages 45–84
- RecruitingHealthy volunteers
Efficacy in Controlling Myopia in Young Children Using a Novel Spectacle Lens
SightGlass Vision, Inc.
- Location
- Oakland, CA + 13 other US sites
- Eligibility basics
- Ages 6–8
- RecruitingHealthy volunteers
Evaluating Heart & Soil's Lifeblood on Iron and Energy Levels
Efforia, Inc
- Location
- New York, NY
- Eligibility basics
- Ages 18+
- RecruitingHealthy volunteers
The Effects on Sleep Quality of 1:4 Reishi Liquid Extract
Efforia, Inc
- Location
- New York, NY
- Eligibility basics
- Ages 18+
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