Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Sep 25, 2026, 3:40 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: Leucine Clear all
Recruiting Phase 3 Interventional

A Pivotal Study of N-Acetyl-L-Leucine on Niemann-Pick Disease Type C

NCT05163288
View directory record Official record
Conditions
Niemann-Pick Disease, Type C
Interventions
N-Acetyl-L-Leucine, Placebo
Drug · Other
Lead sponsor
IntraBio Inc
Industry
Eligibility
4 Years and older
Enrollment
53 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 2, 2026 · Synced Sep 25, 2026, 3:40 AM EDT
Recruiting Not applicable Interventional

Study of HMB-enriched Amino Acid Supplementation in Patients With Alcoholic Liver Disease and COVID-19

NCT04858412
View directory record Official record
Conditions
Alcoholic Liver Disease, COVID 19 Pneumonia
Interventions
β-hydroxy β-methyl butyrate (HMB) enriched amino acid, Balanced amino acid
Dietary Supplement
Lead sponsor
The Cleveland Clinic
Other
Eligibility
21 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 24, 2025 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Phase 2 Interventional Results available

N-Acetyl-L-Leucine for Niemann-Pick Disease, Type C (NPC)

NCT03759639
View directory record Official record
Conditions
Niemann-Pick Disease, Type C
Interventions
IB1001
Drug
Lead sponsor
IntraBio Inc
Industry
Eligibility
6 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 27, 2023 · Synced Sep 25, 2026, 3:40 AM EDT
Terminated Phase 2Phase 3 Interventional Results available

Sacral Neuromodulation (SNM) With InterStimTM for Bowel Dysfunction Following Surgery for Rectal Cancers With Sphincter Preservation

NCT02163187
View directory record Official record
Conditions
Rectal Cancer, for Bowel Dysfunction Following Surgery for Rectal Cancers
Interventions
Implantation of the InterStimTM, MSK BFI questionnaires, The Low Anterior Resection Score (LARS) questionnaires, The EuroQOL5D questionnaires, The Fecal incontinence Quality of Life Scale (FIQOL) questionnaires
Device · Behavioral
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 4, 2018 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dileucine and Resistance Training Adaptations

NCT06121869
View directory record Official record
Conditions
Hypertrophy, Strength Training Adaptations, Weight-Bearing Strengthening Program
Interventions
Placebo, Leucine, Dileucine
Dietary Supplement
Lead sponsor
Lindenwood University
Other
Eligibility
18 Years to 39 Years · Male only
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Saint Charles, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 7, 2023 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nutritional Strategies to Augment the Postprandial Muscle Protein Synthetic Response to the Ingestion of a Low Dose of Protein in Middle-aged Women

NCT02918981
View directory record Official record
Conditions
Aging
Interventions
Resistance Exercise, 14 g Whey protein, 6.6 g Whey protein + 1.25 g leucine, 4 g Whey protein + 1.25 g leucine + 2.6 g Whey peptides, 6.6 g Whey protein + 1.25 g leucine + 0.8 g Citrulline, Water control
Behavioral · Dietary Supplement · Other
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
20 Years to 79 Years · Female only
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 2, 2020 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Not applicable Interventional

Hydrolyzed Casein and Whey Protein Supplementation and the Addition of Leucine to Induce Protein Anabolism in Malnourished COPD Patients

NCT01154400
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Casein protein hydrolysates, Whey protein hydrolysates, Casein protein hydrolysates + LEU, Whey protein hydrolysates + LEU
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Oct 14, 2012 · Synced Sep 25, 2026, 3:40 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Prandial Metabolic Phenotype in Adults

NCT05400733
View directory record Official record
Conditions
Protein Metabolism
Interventions
Total Amino Acids, Essential Amino Acids, Essential Amino Acids + Hydroxy-methylbutyric acid (HMB), Essential Amino Acids + Leucine, Essential Amino Acids High, Placebo Water
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
60 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Sep 25, 2026, 3:40 AM EDT
Recruiting Not applicable Interventional

PKU Protein Requirements

NCT07194993
View directory record Official record
Conditions
PKU
Interventions
Nonradioactive stable oral isotope, Test diet
Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Regulation of Branched-chain Amino Acid Metabolism in Pre-Diabetes

NCT01786941
View directory record Official record
Conditions
Branched-chain Amino Acid Metabolism, Insulin Sensitivity
Interventions
Pre-Diabetes Group - 6-mo Aerobic and Resistance combined exercise training, GBP Group - Non-diabetics intending to undergo Gastric Bypass surgery
Other
Lead sponsor
Duke University
Other
Eligibility
30 Years to 65 Years
Enrollment
132 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 18, 2015 · Synced Sep 25, 2026, 3:40 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Regional Rates of Cerebral Protein Synthesis: Effects of Sleep and Memory Consolidation

NCT00884702
View directory record Official record
Conditions
Brain Mapping
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 28 Years
Enrollment
538 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 5, 2017 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Not applicable Interventional

SmART-TBI: Supplementation With Amino Acid Rehabilitative Therapy in TBI

NCT04603443
View directory record Official record
Conditions
Traumatic Brain Injury
Interventions
Branched Chain Amino Acids, Protein Control
Dietary Supplement
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 65 Years
Enrollment
160 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jan 5, 2026 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Time Course of Postprandial Protein Metabolism

NCT04121689
View directory record Official record
Conditions
Muscle Protein Synthesis, Protein Metabolism
Interventions
Milk Protein Concentrate
Dietary Supplement
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 9, 2019 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Microbial Protease Supplementation on Postprandial Amino Acid Levels

NCT04821557
View directory record Official record
Conditions
Protein Metabolism
Interventions
Protease + Protein, Placebo + Protein
Dietary Supplement
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
20 Years to 50 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 4, 2024 · Synced Sep 25, 2026, 3:40 AM EDT
Recruiting Phase 2 Interventional

Essential Amino Acid Supplementation for Femoral Fragility Fractures

NCT06050668
View directory record Official record
Conditions
Femoral Fracture, Fragility Fracture, Muscle Atrophy
Interventions
Essential Amino Acid Supplementation
Combination Product
Lead sponsor
Michael C Willey
Other
Eligibility
65 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
2
States / cities
Iowa City, Iowa • Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Sep 25, 2026, 3:40 AM EDT
Terminated Phase 2 Interventional Results available

Rapid Antidepressant Effects of Leucine

NCT03079297
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
L-Leucine, Maltodextrin
Drug · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 64 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jan 25, 2023 · Synced Sep 25, 2026, 3:40 AM EDT
Completed No phase listed Observational

PROGENI (Parkinson's Research: The Organized Genetics Initiative) Family Study of LRRK2 (Leucine-rich Repeat Kinase 2)

NCT01536821
View directory record Official record
Conditions
Parkinson Disease
Interventions
Not listed
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
9
States / cities
Weston, Florida • Indianapolis, Indiana • Iowa City, Iowa + 6 more
Source: ClinicalTrials.gov public record
Updated Dec 15, 2013 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Phase 1 Interventional

Leucine Enriched Essential Amino Acid Powder as an Add-on to a Classic Ketogenic Diet in Refractory Epilepsy

NCT06387186
View directory record Official record
Conditions
Refractory Epilepsy, Drug Resistant Epilepsy
Interventions
Leucine-Enriched Essential Amino Acid powder
Drug
Lead sponsor
Elizabeth Anne Thiele
Other
Eligibility
2 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Casein Protein and Leucine Supplementation in Chronic Obstructive Pulmonary Disease (COPD)

NCT01734473
View directory record Official record
Conditions
COPD
Interventions
Hydrolyzed casein protein, Hydrolyzed casein protein + carbohydrates, Hydrolyzed casein protein + leucine, Hydrolyzed casein protein + carbohydrates + leucine, 4 levels of hydrolyzed casein protein + carbohydrates
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Sep 29, 2025 · Synced Sep 25, 2026, 3:40 AM EDT
Terminated Phase 2 Interventional Results available

N-Acetyl-L-Leucine for Ataxia-Telangiectasia (A-T)

NCT03759678
View directory record Official record
Conditions
Ataxia Telangiectasia
Interventions
IB1001
Drug
Lead sponsor
IntraBio Inc
Industry
Eligibility
6 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Orally Ingesting Branched Chained Amino Acids on Delayed Onset Muscle Soreness in Diabetic Patients

NCT01211717
View directory record Official record
Conditions
Type 2 Diabetes, Healthy Individuals
Interventions
Branched Chained Amino Acids, Cellulose Placebo mix
Dietary Supplement · Other
Lead sponsor
Loma Linda University
Other
Eligibility
20 Years to 90 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Apr 21, 2011 · Synced Sep 25, 2026, 3:40 AM EDT
Completed Phase 2 Interventional Results available

The Effect Of NS-0200 Versus Placebo On Hepatic Fat Content In Patients With Non Alcoholic Fatty Liver Disease

NCT02546609
View directory record Official record
Conditions
NAFLD
Interventions
Leu-Met-Sil 0.5, Leu-Met-Sil 1.0, Placebo
Drug
Lead sponsor
NuSirt Biopharma
Industry
Eligibility
18 Years to 75 Years
Enrollment
91 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
13
States / cities
Chino, California • San Diego, California • Wheat Ridge, Colorado + 10 more
Source: ClinicalTrials.gov public record
Updated May 1, 2018 · Synced Sep 25, 2026, 3:40 AM EDT
Completed No phase listed Observational

Protein Synthesis in the Brain of Patients With Fragile X Syndrome

NCT00362843
View directory record Official record
Conditions
Fragile X Syndrome, Healthy Volunteers
Interventions
[15-O]water
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 24 Years · Male only
Enrollment
147 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2020
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 7, 2024 · Synced Sep 25, 2026, 3:40 AM EDT
Active, not recruiting Phase 3 Interventional

A Pivotal Study of N-Acetyl-L-Leucine on Ataxia-Telangiectasia (A-T)

NCT06673056
View directory record Official record
Conditions
Ataxia-Telangiectasia, Ataxia-Telangiectasia (A-T)
Interventions
N-Acetyl-L-Leucine, Placebo
Drug · Other
Lead sponsor
IntraBio Inc
Industry
Eligibility
4 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
3
States / cities
Los Angeles, California • Boston, Massachusetts • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 2, 2025 · Synced Sep 25, 2026, 3:40 AM EDT