To join a healthy clinical trial in United States, select a recruiting trial below and check the eligibility criteria. Contact the trial's principal investigator or the listed site in United States directly. All trials listed here are sourced from ClinicalTrials.gov, the official U.S. registry of clinical studies.

What phases are healthy trials in United States?

Active healthy trials in United States span Phase 1. Phase I trials test safety, Phase II test efficacy, and Phase III compare against standard treatments in larger patient populations.

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ClinicalMetric — Independent clinical trial intelligence platform. Not affiliated with NIH, ClinicalTrials.gov, the U.S. FDA, or any pharmaceutical company, hospital, or clinical research organization. Trial data is sourced from ClinicalTrials.gov for informational purposes only and does not constitute medical advice. Do not make any treatment, enrollment, or health decisions based solely on information found here — always consult a qualified healthcare professional. Full Disclaimer · Last Reviewed: November 2026 · Data Methodology

Active Trials in United States (36)

Feasibility and Acceptability of Mindful Self-Compassion Among Transgender and Nonbinary Young Adults

The ENHANCE Study: taVNS and Psilocybin

A Study for Imaging the Lower Gastrointestinal Tract Using a Retro-TCE Capsule

Airway Data Collection With the Entarik Feeding Tube System

New Orleans Pulmonary Hypertension Biobank

A Phase 1 Study of BLKR201 in Healthy Adult Participants

A Study of TopSpin360 Training Device

Study to Evaluate CAY001 in Healthy Volunteers

Blood Collection for COM/BSBS

Beneficial Exposome Study

Personalized Responses to Dietary Composition Trial 3

Intraoperative OCT Guidance of Intraocular Surgery II

Feasibility of a Wireless Thermal Capsule Endoscopy to Detect Gastrointestinal Thermal Variance

A Study of LY4088044 in Healthy Participants

Evaluation of the Potential of Grape Consumption to Improve Muscle Strength and Cognitive Function

Effect of Hepatic Impairment on the Pharmacokinetics of Mirdametinib

The Gut and Skin Microbiome in Vitiligo Disease Progression

Electrophysiological Source Imaging Guided Transcranial Focused Ultrasound

Impact of Phenylalanine Elevations on Brain and Cognition in Adult PKU Carriers

Investigating Brain Function in People With and Without Visual Snow Syndrome Using Adaptation to Visual Stimuli

Safety and Immunogenicity of V540B in Healthy Adults (V540B-002).

Intermittent Fasting on Body Fat and Quality of Life

High Resolution Pharyngeal Manometry (HRPM) Biofeedback

A Study of Mirikizumab Solution (LY3074828) in Healthy Participants

Data Gathering for A10900

A Study to Learn How the Body Processes the Study Medicine PF-07328948 in People With Reduced Kidney Function

Breathing & Blood Pressure

PET Imaging of Phosphodiesterase-4 (PDE4) in Volunteers With Alzheimer Disease (AD) or Mild Cognitive Impairment (MCI)

Telemedicine to Support Living Kidney Donor Candidates

Evaluate the Pharmacokinetics, Safety, and Tolerability of NSHO-101 in Healthy Participants

Pregnancy 24/7 Offspring Study

Olfactory Transcranial Focused Ultrasound

LPFC Organization in Emotion-Duration Difference Estimation

Identification of Biomarkers for Stress Vulnerability and Resilience

Influence of Brain Oscillation-Dependent TMS on Motor Function

The Mitopure Challenge to Detect Levels of Urolithin A in Dried Blood Spots

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