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 3, Phase 4. 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: July 2026 · Data Methodology

Active Trials in United States (34)

Imaging Techniques in MRI

A Study of LY4065967 in Healthy Participants

A Study to Test How BI 1291583 is Taken up in the Blood of People With and Without Liver Problems

Harnessing Macrophage Lysosomal Lipid Metabolism in Obesity (ATM)

Study of Student Flourishing

Neurobehavioral Signatures of Sign- and Goal-Tracking in Emerging Adults: Translation of a Preclinical Model

Assessment of Neuroinflammation in Central Inflammatory Disorders Using [F-18]DPA-714.

Effects of PFC tDCS on Cognitive Control, Attention Lapses and Coordinated Neural Activity in the Theta and Alpha Bands

Filgrastim-Mobilized Stem Cells for Transplantation Using Unrelated Donors

Examining Bronchial Hyperresponsiveness in Primary Ciliary Dyskinesia

Collection and Distribution of Biospecimens for Novel Research Uses

Fractionated 1927-nm Non Ablative Thulium Laser in Treating Post Inflammatory Hyperpigmentation

CArdioMEtabolic Function and Reserve Capacity in Healthy Adults: The CAMERA Study

Assessment of 11C-JMJ-129 for Imaging PDE4D in Brain and Whole Body of Healthy Volunteers

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

Growth Hormone Resistance of Beta-cells A

A Study of V118E in Healthy Participants (V118E-003)

Tailoring a Home Supervision Intervention for Latinx Caregivers

Adversity, Brain and Opioid Use Study

Evaluate the Effects of Citicoline on Mood in Healthy Adults

A Relative Bioavailability and Bioequivalence Study of Varegacestat in Healthy Participants

Capsule Microbiota Sampling in IBS/Functional Gastrointestinal Disease

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

Electrophysiological Source Imaging Guided Transcranial Focused Ultrasound

LH-001 vs Placebo in Healthy Participants

A Comparison of Neuromuscular Recruitment in Trained and Untrained Adults

Adipose Tissue Blood Flow in Aging Humans

A Provider Intervention to Reduce Financial Toxicity in Patients With Cancer Through Improved Treatment Cost Discussions

Endothelial Derived Hyperpolarization Factor and Vascular Control

Predicting Responsiveness in Oncology Patients Based on Host Response Evaluation During Anti Cancer Treatments, Using Multiomics

Effects of Caffeinated Beverages on Well-being

Studying the Hedonic and Homeostatic Regulation of Food Intake Using Functional MRI

Airway Data Collection With the Entarik Feeding Tube System

PET Imaging of Noradrenergic Transmission in the Brain

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