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Showing 1–24 of 105 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: leucine Clear all
Completed Not applicable Interventional

EAA Intake to Optimize Protein Anabolism in COPD

NCT01173354
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Free balanced amino acid mixture, Free essential amino acid mixture
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Sep 29, 2025 · Synced Sep 1, 2026, 11:20 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Oral Supplement and Acute Resistance Exercise

NCT06801951
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
acute resistance exercise with oral nutrition supplementation, stable tracer infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years to 100 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Jan 29, 2025 · Synced Sep 1, 2026, 11:20 PM EDT
Completed No phase listed Observational

Human CNS Tau Kinetics in Tauopathies

NCT03545126
View directory record Official record
Conditions
Progressive Supranuclear Palsy (PSP), Corticobasal Degeneration (CBD), Frontotemporal Dementia (FTD MAPT Mutation)
Interventions
13C6 Leucine
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 12, 2022 · Synced Sep 1, 2026, 11:20 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Leucine, mTOR and Athero

NCT05470218
View directory record Official record
Conditions
Atherosclerosis
Interventions
Meal
Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 95 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 1, 2026, 11:20 PM 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 1, 2026, 11:20 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effects of Leucine on Body Weight

NCT00683826
View directory record Official record
Conditions
Overweight, Obesity
Interventions
L-Leucine 8gr, Liquid meal, L-Leucine 4g
Dietary Supplement · Other
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 4, 2013 · Synced Sep 1, 2026, 11:20 PM EDT
Completed Phase 2 Interventional Results available

Dose Comparisons of Leucine-Metformin Combinations on Blood Glucose Levels In Type 2 Diabetic Patients

NCT02151461
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
Low Metformin, Metformin, Mid Metformin, High Metformin
Drug
Lead sponsor
NuSirt Biopharma
Industry
Eligibility
18 Years and older
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
9
States / cities
Chino, California • Palm Beach, Florida • Tampa, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated Feb 26, 2018 · Synced Sep 1, 2026, 11:20 PM EDT
Recruiting Phase 2 Interventional

A Study of Amivantamab in Participants With Advanced or Metastatic Solid Tumors Including Epidermal Growth Factor Receptor (EGFR)-Mutated Non-Small Cell Lung Cancer

NCT05498428
View directory record Official record
Conditions
Carcinoma, Non-small-Cell Lung
Interventions
Amivantamab, Lazertinib, Carboplatin, Pemetrexed, Direct Oral Anticoagulant (DOAC), Low Molecular Weight Heparin (LMWH)
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years and older
Enrollment
520 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
26
States / cities
La Jolla, California • Orange, California • Stanford, California + 21 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 1, 2026, 11:20 PM EDT
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 1, 2026, 11:20 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Estrogen and Serotonin on Changing Brain Chemistry

NCT01208324
View directory record Official record
Conditions
Menopause
Interventions
estrogen patch, Amino acids, Placebo Patch, Placebo pills
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
48 Years to 60 Years · Female only
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2018
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 1, 2021 · Synced Sep 1, 2026, 11:20 PM EDT
Terminated Phase 2 Interventional Results available

A Study to Test the Efficacy, Safety, and Pharmacokinetics of Rozanolixizumab in Adult Study Participants With Leucine-Rich Glioma Inactivated 1 Autoimmune Encephalitis

NCT04875975
View directory record Official record
Conditions
Leucine-Rich Glioma Inactivated 1 Autoimmune Encephalitis
Interventions
Rozanolixizumab, Placebo
Drug
Lead sponsor
UCB Biopharma SRL
Industry
Eligibility
18 Years to 89 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
9
States / cities
Aurora, Colorado • Jacksonville, Florida • Boston, Massachusetts + 5 more
Source: ClinicalTrials.gov public record
Updated May 30, 2025 · Synced Sep 1, 2026, 11:20 PM EDT
Completed Not applicable Interventional

Effects of Nutritional Supplementation (Product 4808) on Acute Skeletal Muscle Protein Synthesis in Cancer Patients

NCT00446888
View directory record Official record
Conditions
Cancer
Interventions
Standardized Meals for Diet Stabilization, Forticare, Product 4808
Behavioral · Dietary Supplement
Lead sponsor
University of Arkansas
Other
Eligibility
40 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Jun 18, 2009 · Synced Sep 1, 2026, 11:20 PM 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 1, 2026, 11:20 PM EDT
Completed Phase 1 Interventional

N-acetylcysteine (NAC) for Improving Cognitive Dysfunction in Schizophrenia

NCT01885338
View directory record Official record
Conditions
Schizophrenia
Interventions
N-acetylcysteine (NAC), Inactive placebo capsule
Drug
Lead sponsor
VA Greater Los Angeles Healthcare System
Federal
Eligibility
18 Years to 65 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 3, 2015 · Synced Sep 1, 2026, 11:20 PM 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 1, 2026, 11:20 PM 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 1, 2026, 11:20 PM 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 1, 2026, 11:20 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Research Study to Determine if an Experimental Agent, LLME Can Decrease the Incidence and Severity of Graft-Versus-Host-Disease (GVHD) Following Blood (Hematopoietic) Stem Cell Transplantation

NCT00429416
View directory record Official record
Conditions
Hematologic Malignancies
Interventions
L-leucyl-L-leucine Methyl Ester (LLME), Fludarabine, Cytarabine, Cyclophosphamide, Tacrolimus, Mesna, Granulocyte Macrophage Colony-Stimulating Factor (GM-CSF), Hematopoietic stem cell transplantation (HSCT)
Drug · Biological · Procedure
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 28, 2016 · Synced Sep 1, 2026, 11:20 PM EDT
Completed Not applicable Interventional Results available

Collaborative Research Group for Necrotizing Enterocolitis

NCT00828451
View directory record Official record
Conditions
Prematurity, Necrotizing Enterocolitis
Interventions
[5,5,5-2H3]leucine (stable isotope labeled leucine)
Biological
Lead sponsor
Washington University School of Medicine
Other
Eligibility
1 Day to 7 Days
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 3, 2018 · Synced Sep 1, 2026, 11:20 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Study of Metabolic Effects of Pregnancy in Women With Cystic Fibrosis

NCT00014768
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
glucose, insulin, leucine
Drug
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
0 Years and older · Female only
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2001
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 1, 2026, 11:20 PM EDT
Recruiting Phase 1 Interventional

Phase 1a/b Study of ZL-6201 Safety, PK, and Preliminary Efficacy in Sarcoma and Selected Tumors

NCT07374848
View directory record Official record
Conditions
Solid Tumors, Sarcomas
Interventions
ZL-6201
Drug
Lead sponsor
Zai Lab (Shanghai) Co., Ltd.
Industry
Eligibility
18 Years and older
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
6
States / cities
Los Angeles, California • New Haven, Connecticut • Sarasota, Florida + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 1, 2026, 11:20 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

High Quality Protein for Assisting With Weight Loss

NCT03085511
View directory record Official record
Conditions
Obesity
Interventions
Egg breakfast (EB), Weight Loss Counseling, Weight Loss Diet, Cereal Breakfast (CB)
Behavioral
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 44 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated May 29, 2019 · Synced Sep 1, 2026, 11:20 PM 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 1, 2026, 11:20 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Chronic Obstructive Pulmonary Disorder and Acute Exercise

NCT02780219
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive
Interventions
stable amino acid infusion, acute exercise with amino acid infusion, 24-hour post exercise amino acid infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years and older
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Feb 2, 2025 · Synced Sep 1, 2026, 11:20 PM EDT