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ClinicalTrials.gov public records Last synced Oct 28, 2026, 10:28 AM EDT

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Showing 1–24 of 73 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: citrulline Clear all
Terminated Not applicable Interventional

Nutraceutical Citrulline in Pregnancy

NCT02772887
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
L-Citrulline, Placebo
Dietary Supplement · Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
14 Years to 40 Years · Female only
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 30, 2019 · Synced Oct 28, 2026, 10:28 AM EDT
Terminated Early Phase 1 Interventional Results available

L-citrulline and Pulmonary Hypertension Associated With Bronchopulmonary Dysplasia

NCT03542812
View directory record Official record
Conditions
Infant,Premature, Bronchopulmonary Dysplasia, Pulmonary Hypertension
Interventions
L-Citrulline
Drug
Lead sponsor
University of Utah
Other
Eligibility
14 Days to 3 Months
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 10, 2024 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Whole Body Vibration Combined With L-citrulline Supplementation on Cardiovascular Function and Body Composition

NCT02143817
View directory record Official record
Conditions
Obesity, Pre-hypertension, Hypertension
Interventions
L-citrulline supplementation, Whole Body Vibration Training
Dietary Supplement · Other
Lead sponsor
Florida State University
Other
Eligibility
50 Years to 70 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Mar 10, 2015 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

L-citrulline Supplementation & Cold Exposure

NCT01462591
View directory record Official record
Conditions
Hypertension
Interventions
L-citrulline
Dietary Supplement
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Aug 5, 2014 · Synced Oct 28, 2026, 10:28 AM EDT
Recruiting Phase 1 Interventional

Novel Approaches for Improving Vascular Function in Veterans With HFpEF

NCT06312748
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction, Inflammation
Interventions
L-Citrulline, Placebo for L-Citrulline, BH4, Placebo for BH4, Atorvastatin, Placebo for Atorvastatin
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2030
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

2 Weeks of Citrulline Supplementation on Arterial Function in Postmenopausal Women With Elevated Blood Pressure or Hypertension

NCT06025383
View directory record Official record
Conditions
Menopause, Hypertension
Interventions
L-Citrulline, Placebo
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
50 Years to 70 Years · Female only
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated May 15, 2025 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Metabolic Processes in Adults and Adolescents With Autism Spectrum Disorder

NCT02733120
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
stable isotope infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
16 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Phase 3 Interventional Results available

L-citrulline for Prevention of Sequelae of Acute Lung Injury in Pediatrics Undergoing Cardiopulmonary Bypass for Heart Defects

NCT02891837
View directory record Official record
Conditions
Acute Lung Injury
Interventions
L-citrulline, Placebo
Drug · Other
Lead sponsor
Asklepion Pharmaceuticals, LLC
Industry
Eligibility
Up to 18 Years
Enrollment
189 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
20
States / cities
Birmingham, Alabama • Loma Linda, California • Sacramento, California + 16 more
Source: ClinicalTrials.gov public record
Updated Feb 23, 2023 · Synced Oct 28, 2026, 10:28 AM EDT
Terminated Phase 1Phase 2 Interventional

L-citrulline Injection in Patients Aged 6-21 Years Old with Sickle Cell Disease Presenting with Vaso-Occlusive Crisis (VOC)

NCT04852172
View directory record Official record
Conditions
Acute Vaso Occlusive Crisis (VOC)
Interventions
L-citrulline, D5 1/2NS
Drug · Other
Lead sponsor
Asklepion Pharmaceuticals, LLC
Industry
Eligibility
6 Years to 21 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
2
States / cities
Washington D.C., District of Columbia • Jackson, Mississippi
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

L-citrulline Supplementation, Cold Exposure, & Post-Exercise Muscle Ischemia

NCT02104375
View directory record Official record
Conditions
Hypertension
Interventions
L-citrulline
Dietary Supplement
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Mar 10, 2015 · Synced Oct 28, 2026, 10:28 AM EDT
Terminated Early Phase 1 Interventional Accepts healthy volunteers Results available

Vascular Dysfunction in Black Individuals: Roles of Nitric Oxide and Endothelin-1

NCT04770155
View directory record Official record
Conditions
Vascular Function, Racial Disparity
Interventions
Dietary Nitrates 400 mg, L-citrulline 3 g, Sildenafil 100 mg, Bosentan 125 mg
Dietary Supplement · Drug
Lead sponsor
University of Mississippi Medical Center
Other
Eligibility
18 Years to 40 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Jackson, Mississippi
Source: ClinicalTrials.gov public record
Updated Oct 31, 2023 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of 4 Weeks of L-Citrulline Supplementation on Macro- and Microvascular Function in Type 2 Diabetes

NCT06016478
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
L-citrulline, Placebo
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
40 Years to 75 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated May 15, 2025 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Safety Evaluation of a Diet and Nutritional Supplementation Program- Purify 2.0

NCT03685552
View directory record Official record
Conditions
Gastrointestinal Symptoms
Interventions
Prog: Purify-2
Other
Lead sponsor
Nature's Sunshine Products, Inc.
Industry
Eligibility
18 Years to 69 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Lehi, Utah
Source: ClinicalTrials.gov public record
Updated Sep 26, 2018 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Oral L-Citrulline and ADMA in Pregnancy

NCT00743210
View directory record Official record
Conditions
Blood Pressure
Interventions
L-citrulline, Placebo
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
14 Years to 40 Years · Female only
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 16, 2014 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

CHF COPD Sip Feed Anabolic Response

NCT02770092
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive, Congestive Heart Failure
Interventions
sip feeding with stable isotope infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years and older
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Oct 1, 2025 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of a Nitric Oxide Supplementation Product on Endothelial Dysfunction and Prehypertensive Adults

NCT03895749
View directory record Official record
Conditions
Hypertension
Interventions
NEO40 Daily
Dietary Supplement
Lead sponsor
Hypertension Institute, Nashville
Other
Eligibility
18 Years to 75 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 30, 2019 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of 4 Weeks of Citrulline and Glutathione Supplementation on Arterial Function

NCT04672447
View directory record Official record
Conditions
Menopause, Cardiovascular Risk Factor
Interventions
L-Citrulline, Placebo, Glutathione
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
50 Years to 79 Years · Female only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Oct 20, 2022 · Synced Oct 28, 2026, 10:28 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Pre-Run Nutritional Supplements During a Fixed-Pace 5 km Treadmill Run

NCT07854223
View directory record Official record
Conditions
Exercise Physiology, Nutritional Supplementation
Interventions
Caffeine, L-Citrulline, Exogenous Ketone (Beta-Hydroxybutyrate), placebo beverage
Dietary Supplement · Other
Lead sponsor
St. Louis University
Other
Eligibility
18 Years to 35 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional

Asthma L-Citrulline Pilot Study

NCT02943161
View directory record Official record
Conditions
Asthma
Interventions
L-Citrulline
Dietary Supplement
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 70 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
2
States / cities
Aurora, Colorado • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 27, 2020 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nitric Oxide Flux and Ureagenesis in Argininosuccinate Synthetase Deficiency (ASSD)(Citrullinemia I)

NCT01610089
View directory record Official record
Conditions
Citrullinemia
Interventions
stable isotope infusion
Other
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 20, 2015 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional Results available

Glutamine and Insulin Sensitivity in Type I Diabetes

NCT01467063
View directory record Official record
Conditions
Type I Diabetes Mellitus
Interventions
Glutamine, Placebo
Dietary Supplement
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
13 Years to 19 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 14, 2021 · Synced Oct 28, 2026, 10:28 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Anabolic Response Cancer

NCT02793531
View directory record Official record
Conditions
Cancer
Interventions
Stable isotope amino acid infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Mar 22, 2018 · Synced Oct 28, 2026, 10:28 AM EDT
Completed Not applicable Interventional

Very Low Calorie Diet Weight Loss

NCT02780206
View directory record Official record
Conditions
Obesity, Very Low Calorie Diet
Interventions
Stable isotope amino acid infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
30 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Feb 4, 2022 · Synced Oct 28, 2026, 10:28 AM EDT
Not listed Phase 1 Interventional

PK and PD Responses to Oral L-Citrulline in Patients With Sickle Cell Disease

NCT00343954
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
L-citrulline tablets, 1000 mg
Drug
Lead sponsor
Angiogenix
Industry
Eligibility
10 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 23, 2006 · Synced Oct 28, 2026, 10:28 AM EDT