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ClinicalTrials.gov public records Last synced Oct 17, 2026, 1:57 AM EDT

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Showing 1–24 of 42 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Essential Amino Acids + Leucine Clear all
Not listed Not applicable Interventional

Gluconeogenesis in Very Low Birth Weight Infants Who Are Receiving Nutrition By Intravenous Infusion

NCT00005889
View directory record Official record
Conditions
Infant, Low Birth Weight, Hyperglycemia
Interventions
alanine, amino acids, glucagon, glucose, glutamine, glycerol, insulin, leucine, lipids, urea
Drug
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
4 Days to 6 Days
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1999
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 24, 2005 · Synced Oct 17, 2026, 1:57 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 2, 2017 · Synced Oct 17, 2026, 1:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Intake and Circulating Levels of Branched Chain Amino Acids

NCT02110602
View directory record Official record
Conditions
Dietary Intake of Branched Chain Amino Acids
Interventions
Diet high in amino acid levels, Diet low in amino acid levels
Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
20 Years to 40 Years · Male only
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 7, 2016 · Synced Oct 17, 2026, 1:57 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 26, 2023 · Synced Oct 17, 2026, 1:57 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 27, 2018 · Synced Oct 17, 2026, 1:57 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 15, 2012 · Synced Oct 17, 2026, 1:57 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 22, 2011 · Synced Oct 17, 2026, 1:57 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 25, 2026 · Synced Oct 17, 2026, 1:57 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Vitamin B6 Effects for Women Taking Birth Control Pills

NCT01128244
View directory record Official record
Conditions
Vitamin B6 Deficiency
Interventions
Vitamin B6, Infusion of labeled serine, methionine and leucine
Dietary Supplement · Procedure
Lead sponsor
University of Florida
Other
Eligibility
20 Years to 40 Years · Female only
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 7, 2017 · Synced Oct 17, 2026, 1:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Preserving Muscle Mass and Function in Bedridden Older Adults

NCT01846130
View directory record Official record
Conditions
Bed Rest
Interventions
Leucine, Exercise, Whey protein
Dietary Supplement · Behavioral
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
60 Years to 80 Years
Enrollment
123 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 24, 2019 · Synced Oct 17, 2026, 1:57 AM EDT
Completed Phase 2 Interventional Results available

An Extension Protocol to Evaluate Dose Comparisons of Leucine-Metformin Combinations in Type 2 Diabetic Patients

NCT02435277
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
Low Metformin, Mid Metformin, High Metformin, Metformin
Drug
Lead sponsor
NuSirt Biopharma
Industry
Eligibility
18 Years and older
Enrollment
50 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 Jan 17, 2018 · Synced Oct 17, 2026, 1:57 AM EDT
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 30, 2025 · Synced Oct 17, 2026, 1:57 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 30, 2025 · Synced Oct 17, 2026, 1:57 AM EDT
Completed No phase listed Observational

Genetic Regulation of Surfactant Deficiency

NCT00828243
View directory record Official record
Conditions
Respiratory Distress Syndrome, Newborn
Interventions
Nutrient
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
1 Day to 6 Months
Enrollment
525 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2013
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 7, 2021 · Synced Oct 17, 2026, 1:57 AM 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 2, 2021 · Synced Oct 17, 2026, 1:57 AM EDT
Recruiting Not applicable Interventional

Daily Amino Acid Supplementation for People With Parkinson's Disease

NCT07115563
View directory record Official record
Conditions
Parkinson Disease (PD)
Interventions
Targeted Amino Acid Supplement, Control (placebo)
Dietary Supplement
Lead sponsor
Cristina Colon-Semenza
Other
Eligibility
50 Years to 90 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
2
States / cities
Farmington, Connecticut • Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Oct 17, 2026, 1:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Muscle Mass During Space Exploration

NCT00968344
View directory record Official record
Conditions
Muscle Loss
Interventions
Leucine, Alanine
Dietary Supplement
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
45 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated May 31, 2019 · Synced Oct 17, 2026, 1:57 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 21, 2026 · Synced Oct 17, 2026, 1:57 AM EDT
Terminated Early Phase 1 Interventional Accepts healthy volunteers Results available

Leucine for Depression Study (L-DEP)

NCT03557684
View directory record Official record
Conditions
Depression
Interventions
leucine, PO placebo, lipopolysaccharide (LPS), IV placebo
Dietary Supplement · Other · Biological
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 65 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 8, 2023 · Synced Oct 17, 2026, 1:57 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 Oct 7, 2026 · Synced Oct 17, 2026, 1:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Skeletal Muscle Protein Synthetic Response to Amino Acid and Peptides

NCT03952884
View directory record Official record
Conditions
Protein Metabolism
Interventions
Resistance Exercise, No Resistance Exercise, Leucine, Dileucine
Behavioral · Dietary Supplement
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
18 Years to 35 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 28, 2020 · Synced Oct 17, 2026, 1:57 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Essential Amino Acids Supplementation and Muscle Protein Synthesis

NCT01366924
View directory record Official record
Conditions
Muscle Loss, Muscle Anabolism
Interventions
Essential Amino Acids, Endurance exercise
Dietary Supplement · Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 35 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
2
States / cities
Boston, Massachusetts • Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 21, 2017 · Synced Oct 17, 2026, 1:57 AM EDT
Withdrawn Early Phase 1 Interventional Accepts healthy volunteers

SOAR-2: Intervening in Obesity Through Reduction of Dietary Branched Chain Amino Acids

NCT04424537
View directory record Official record
Conditions
Obesity, Diabetes
Interventions
Control diet, Low branched-chain amino acids(BCAA) diet, Low protein diet
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
30 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 4, 2022 · Synced Oct 17, 2026, 1:57 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 22, 2026 · Synced Oct 17, 2026, 1:57 AM EDT