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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: L-leucine Clear all
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 26, 2026, 2:27 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of PF-04360365 On ABETA In Patients With Alzheimer's Disease And Healthy Volunteers

NCT01005862
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
PF-04360365, Placebo
Biological · Drug
Lead sponsor
Pfizer
Industry
Eligibility
21 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
2
States / cities
Glendale, California • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 25, 2012 · Synced Sep 26, 2026, 2:27 AM EDT
Terminated Phase 2 Interventional

A Study to Accelerate Immune System Recovery Following Stem Cell Transplantation

NCT00429039
View directory record Official record
Conditions
ALLOGENEIC HEMATOPOIETIC STEM CELL TRANSPLANTATION
Interventions
L-leucyl-L-leucine methyl ester (LLME)
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Thomas Jefferson University
Other
Eligibility
16 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2009
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 20, 2016 · Synced Sep 26, 2026, 2:27 AM EDT
Completed Phase 2 Interventional Results available

Vaccine Therapy With PROSTVAC/TRICOM and Flutamide Versus Flutamide Alone to Treat Prostate Cancer

NCT00450463
View directory record Official record
Conditions
Prostate Cancer
Interventions
Sargramostim (GM-CSF, Leukine), Flutamide (Eulexin), PROSTVAC-F/ TRICOM, PROSTVAC-V/TRICOM
Drug · Biological
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 110 Years · Male only
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2017
U.S. locations
3
States / cities
Bethesda, Maryland • New Brunswick, New Jersey • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 28, 2018 · Synced Sep 26, 2026, 2:27 AM EDT
Completed Not applicable Interventional

BCAA Supplemental Study

NCT03339232
View directory record Official record
Conditions
Cirrhosis
Interventions
BCAA Supplement, Physical Activity
Dietary Supplement · Other
Lead sponsor
Loyola University
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 23, 2020 · Synced Sep 26, 2026, 2:27 AM 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 26, 2026, 2:27 AM EDT
Recruiting Phase 2 Interventional

A Phase 2 Study and Open-Label Extension of NEU-411 in Companion Diagnostic-Positive Participants With Early Parkinson's Disease

NCT06680830
View directory record Official record
Conditions
Parkinson Disease, Parkinson, Idiopathic Parkinson Disease, Early Parkinson Disease (Early PD), Parkinson Disease, Idiopathic
Interventions
NEU-411, Placebo
Drug · Other
Lead sponsor
Neuron23 Inc.
Industry
Eligibility
40 Years to 80 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
45
States / cities
Sun City, Arizona • Little Rock, Arkansas • Fresno, California + 40 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 26, 2026, 2:27 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 26, 2026, 2:27 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 26, 2026, 2:27 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

How Animal and Plant Protein Shakes Change the Body's Nutrient and Health Responses

NCT07121010
View directory record Official record
Conditions
Cardiometabolic Health
Interventions
Animal-Based Protein Smoothie, Plant-Based Protein Smoothie, Plant-Based Protein Smoothie with Leucine
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Sep 26, 2026, 2:27 AM 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 26, 2026, 2:27 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Hydroxyproline Influence on Oxalate Metabolism

NCT02038543
View directory record Official record
Conditions
Hyperoxaluria
Interventions
Hydroxyproline and Leucine
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
15 Years to 65 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 26, 2026, 2:27 AM EDT
Recruiting Phase 2 Interventional

Leucine in Midlife Depression

NCT06580145
View directory record Official record
Conditions
Major Depression
Interventions
L-leucine, L-lysine
Drug
Lead sponsor
Emory University
Other
Eligibility
35 Years to 65 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 10, 2026 · Synced Sep 26, 2026, 2:27 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

: Vascular Function in Health and Disease

NCT02966665
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, Pulmonary Artery Hypertension, Heart Failure, Hypertension
Interventions
Maximum Exercise Tests, BH4, L-NMMA, Vitamin C, Vitamin E, α-Lipoic Acid and L-Ascorbate, BQ-123, Fexofenadine, Ranitidine, Angiotensin-II, Valsartan, Acetylcholine, Sodium Nitroprusside, Angiotensin-II, Norepinephrine, Phentolamine, BQ-123, MitoQ, BH4
Other · Drug
Lead sponsor
D. Walter Wray
Other
Eligibility
18 Years and older
Enrollment
420 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2030
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Sep 24, 2026 · Synced Sep 26, 2026, 2:27 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 26, 2026, 2:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin B6 Dependence of One-Carbon Metabolism

NCT00877812
View directory record Official record
Conditions
Vitamin B6 Deficiency
Interventions
Arm 1 glycine and leucine, Arm 2 Intervention of Serine and methionine infusion
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
20 Years to 40 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 26, 2013 · Synced Sep 26, 2026, 2:27 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 26, 2026, 2:27 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Leucine Enriched Essential Amino Acid Mixture to Reverse Muscle Loss in Cirrhosis

NCT03208868
View directory record Official record
Conditions
Cirrhosis, Liver
Interventions
Leucine enriched essential amino acid (EEA/LEU), Balanced amino acid supplement (BAA)
Dietary Supplement
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2028
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Sep 26, 2026, 2:27 AM EDT
Completed Phase 3 Interventional Results available

SYD985 vs. Physician's Choice in Participants With HER2-positive Locally Advanced or Metastatic Breast Cancer

NCT03262935
View directory record Official record
Conditions
Metastatic Breast Cancer
Interventions
(vic-)trastuzumab duocarmazine, Physician's choice
Drug
Lead sponsor
Byondis B.V.
Industry
Eligibility
18 Years and older · Female only
Enrollment
437 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
23
States / cities
Mobile, Alabama • Tucson, Arizona • San Diego, California + 17 more
Source: ClinicalTrials.gov public record
Updated Oct 18, 2023 · Synced Sep 26, 2026, 2:27 AM 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 26, 2026, 2:27 AM 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 26, 2026, 2:27 AM 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 26, 2026, 2:27 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 26, 2026, 2:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Skeletal Muscle Response to Amino Acids and Load Carriage Exercise

NCT01714479
View directory record Official record
Conditions
Muscle Loss, Muscle Anabolism, Muscle Performance
Interventions
Leucine-enriched nutritional supplement, Placebo
Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 39 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 20, 2017 · Synced Sep 26, 2026, 2:27 AM EDT