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ClinicalTrials.gov 126 recruiting now early-phase tilt #38 of 28,707 conditions

Aging: early-phase trial registry

126 of 263 indexed Aging trials are currently recruiting, with more weight in Phase 1-2.

Corpus placement: #38 of 28,707 conditions by registered trial count.

263 US clinical trials · 126 currently recruiting · #38 of 28,707 conditions by registered trial count

Aging: 263 US clinical trials tracked, 126 recruiting.

Aging is the subject of 263 registered US clinical trials on ClinicalTrials.gov, 126 of them currently open to new participants. 14 are in Phase 3-4 (later-stage) and 48 in Phase 1-2 (earlier-stage). The most active sponsor is University of Florida, running 14 of these trials.

Enrollment posture brief

Registry condition aging

OPEN 126 | RECR 48% | LATE 14 | EARLY 48 | RANK #38 | SPON 14

Nearest open-share peer: Lung Non-Small Cell Carcinoma (48% recruiting · 48 trials)

Opioid Use Disorder60.5%Aging (this)48%Post Traumatic Stress Disord41.5%Head and Neck Cancer34.2%Melanoma33.1%
Open-enrollment share among volume-matched conditions near Aging

Aging lists 126 open slots (48% of 263 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →

Key findings

What ClinicalTrials.gov does not surface for Aging on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.

  1. Aging is recruiting above its size-band peers.

    126 of 263 indexed trials (47.9%) are open to enrollment, against a 37.1% average across 139 conditions with 100+ trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.

  2. Sponsorship of Aging trials is spread across many organizations.

    University of Florida accounts for 14 of 263 trials (5.3%). 132 distinct sponsors appear on at least one study for this condition label.

  3. Most Aging trials plan to enrol fewer than 100 people.

    Median target enrolment is 66 among the 263 trials that report a genuine target (sentinel values excluded). 166 of those (63.1%) plan for fewer than 100 participants.

  4. Aging research is mostly interventional.

    228 interventional and 35 observational studies make up this index (86.7% interventional). Study type is sponsor-reported on ClinicalTrials.gov.

Phase 129Phase 219Phase 36Phase 48

Open and recent trials

263 total, page 2 of 6

RECRUITING Phase 4 100 participants

Cardiometabolic Consequences of the Loss of Ovarian Function

University of Colorado, Denver

NCT06264882

RECRUITING NA 100 participants

Identifying Challenges to Healthy Aging in Persons With Human Immunodeficiency Virus (HIV) Age 50 and Older

Wake Forest University Health Sciences

NCT05858034

RECRUITING 100 participants

Metabolic and Functional Consequences of Aging in Health and Disease

Texas A&M University

NCT05240885

RECRUITING NA 100 participants

Mindfulness for Cognition in Early-stage Alzheimer's Disease

VA Boston Healthcare System

NCT06792877

RECRUITING NA 100 participants

Multimodal Musical Stimulation for Healthy Neurocognitive Aging

Northeastern University

NCT06229093

RECRUITING NA 100 participants

Heat Waves and the Elderly - Cooling Modalities

University of Texas Southwestern Medical Center

NCT05484739

RECRUITING NA 100 participants

Speech Perception and High Cognitive Demand

University of Maryland, College Park

NCT04997577

RECRUITING NA 90 participants

Studying the Effects of Digital Interventions on Cognition, Wellbeing, Stress, and Sleep in Older Adults

University of California, San Francisco

NCT06633978

RECRUITING NA 90 participants

Inspiratory Muscle Strength Training for Lowering Blood Pressure and Improving Endothelial Function in Postmenopausal Women: Comparison With "Standard of Care" Aerobic Exercise

University of Colorado, Boulder

NCT05000515

RECRUITING NA 85 participants

Neurobiological Mechanisms of Aging and Stress on Prospective Navigation

Georgia Institute of Technology

NCT03896529

RECRUITING Phase 2 80 participants

Empagliflozin Reversal of Arterial StiffnEss in Aging

University of Missouri-Columbia

NCT06506422

RECRUITING NA 80 participants

Emotional Well-being and Measures of Healthy Aging

Northwestern University

NCT07334106

RECRUITING NA 80 participants

Effect of Walnuts on Cognitive Function and Gut Microbiome in Older Adults

Oregon State University

NCT06942351

RECRUITING 80 participants

Molecular Optimization Via Exercise (MOVE)

Buck Institute for Research on Aging

NCT06540287

RECRUITING NA 80 participants

IH, Brain Health, and T2D

Darren P Casey

NCT07173543

RECRUITING NA 80 participants

The Preventive Role of Fractionated Laser Resurfacing Against Actinic Neoplasia in an At-Risk Geriatric Population

Wright State University

NCT06428721

RECRUITING Phase 4 75 participants

A Deep Longitudinal Analysis of Next Generation Influenza Vaccines in Older Adults

The Jackson Laboratory

NCT05518500

RECRUITING Early Phase 1 75 participants

Impact of Early Aging and Menopause on the Vascular Responses to Hypoxia

University of Missouri-Columbia

NCT06417177

RECRUITING NA 75 participants

Cognitive Remediation

Cutter Lindbergh

NCT07171450

RECRUITING 72 participants

Postural Control During Concurrent Cognitive Tasks During Optic Flow Stimulation

Chia-Cheng Lin, PhD, PT, MSPT

NCT05117463

RECRUITING NA 72 participants

Effects of Obesity in the Aged

University of Texas Southwestern Medical Center

NCT05028309

RECRUITING NA 72 participants

Feasibility of Home-based tES for Older Adults at Risk of Falling

Hebrew SeniorLife

NCT04732533

RECRUITING Phase 1 72 participants

Rapalog Pharmacology (RAP PAC) Study

University of Wisconsin, Madison

NCT05949658

RECRUITING NA 72 participants

Effectiveness of Fractionated Laser Resurfacing to Protect Geriatric Skin From Actinic Neoplasia

Wright State University

NCT03906253

RECRUITING NA 72 participants

Targeting Oxidative Stress to Prevent Vascular and Skeletal Muscle Dysfunction During Disuse

Joel Trinity

NCT04351113

RECRUITING NA 70 participants

Using Reinforcement Learning to Personalize Electronic Health Record Tools to Facilitate Deprescribing

Brigham and Women's Hospital

NCT06660979

RECRUITING NA 68 participants

Modulating Neurocognitive Processes of Learning to Trust and Distrust in Aging

University of Florida

NCT05457725

RECRUITING NA 68 participants

Optimizing Strength Training in Older Adults

Queens College, The City University of New York

NCT06812143

RECRUITING Phase 2 66 participants

Acetate and Age-associated Arterial Dysfunction

University of Colorado, Denver

NCT05424263

RECRUITING Early Phase 1 64 participants

Early Neurovascular Adaptations in Aging Women

University of Missouri-Columbia

NCT06520982

RECRUITING Phase 4 60 participants

The Role of Neutrophils in the Age-driven Decline in Anti-pneumococcal Vaccine Responses

State University of New York at Buffalo

NCT06128915

RECRUITING NA 60 participants

Effect of Snacks on Aging

University of California, Los Angeles

NCT06879626

RECRUITING Phase 1 60 participants

MTOR Inhibitors in Older Adults

University of Texas Southwestern Medical Center

NCT06727305

RECRUITING NA 60 participants

Fatty Acid Modulation of Brain Function in Older Adults

University of Vermont

NCT06192407

RECRUITING Phase 2 60 participants

The Mito-Frail Trial: Effects of MitoQ on Vasodilation, Mobility and Cognitive Performance in Frail Older Adults

UConn Health

NCT06027554

RECRUITING Phase 2 60 participants

Ischemic Conditioning to Promote Microvascular Resiliency in Frail Individuals

Medical College of Wisconsin

NCT05808686

RECRUITING NA 55 participants

Reducing Blood Pressure in Mid-life Adult Binge Drinkers

The University of Texas at Arlington

NCT05522075

RECRUITING NA 54 participants

Breaking Sitting with High-intensity Interval Training for Brain Health

University of Illinois at Urbana-Champaign

NCT06243016

RECRUITING NA 50 participants

The Role of Type 2 Diabetes on Skeletal Muscle Atrophy and Recovery Following Bed Rest in Older Adults

AdventHealth Translational Research Institute

NCT03761446

RECRUITING NA 48 participants

Using Nicotine to Reverse Age-related Auditory Processing Deficits

University of California, Irvine

NCT04971954

RECRUITING Early Phase 1 48 participants

Effects of Nicotine and Attention on Frequency Tuning in Auditory Cortex

University of California, Berkeley

NCT05018117

RECRUITING Early Phase 1 45 participants

Transient Receptor Potential Channels

Penn State University

NCT06444594

RECRUITING NA 45 participants

Leveraging Social Networks to Improve Sleep and Mindfulness Among Older Adults in Residential Housing Facilities

Brigham and Women's Hospital

NCT06989619

RECRUITING NA 40 participants

Nicotinamide Mononucleotide Supplementation for Exercise Tolerance Improvement in Healthy Older Adults

Scott Silveira

NCT07144527

RECRUITING Phase 1 40 participants

Investigating the Persisting Effects of a Single Dose of Psilocybin on Structural Plasticity in Healthy Older Adults

University of California, Berkeley

NCT06367738

RECRUITING NA 36 participants

Preliminary Testing of Cafe Move for Primary Prevention of Physical Frailty

University of Montana

NCT05720507

RECRUITING NA 36 participants

Brain Research Assessing Impacts of Neurophysiological Processing Speed Training in Veterans

University of Alabama at Birmingham

NCT06217575

RECRUITING Phase 1 35 participants

Effect of a Daily Supplement on Plasma PAI-1 Levels

University of California, Los Angeles

NCT07469475

RECRUITING Phase 2 34 participants

Fisetin to Reduce Senescence and Mobility Impairment in PAD

Northwestern University

NCT06399809

RECRUITING NA 34 participants

Pain and Split-belt Motor Learning in Older Adults

University of Delaware

NCT07054840

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Phase Distribution

PhaseTrial count
Phase 1 29
Phase 2 19
Phase 3 6
Phase 4 8

Named interventions

Most-linked intervention names on Aging records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.

Placebo Other
8 trials
Placebo Dietary supplement
7 trials
Placebo Drug
6 trials
Rapamycin Drug
3 trials
MediTrain Device
3 trials
Control Other
3 trials
Metformin Drug
3 trials
Exercise Behavioral
3 trials

US sites by state

Facility locations filed on Aging trials. A trial with sites in several states counts in each.

California 33 trials
Florida 27 trials
Texas 26 trials
Massachusetts 26 trials
Colorado 20 trials
North Carolina 13 trials
Maryland 13 trials
Illinois 12 trials

Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.

What to do with this Aging page

263 registered trials, 126 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.

Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.

Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Aging condition card totals 263 registered trials; most-linked intervention Placebo; top US site state California. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.