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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Citrulline Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of Sports Supplements on Blood Flow

NCT04278053
View directory record Official record
Conditions
Determine the Effects of Nitrosigine and Citrulline-malate on Flow-mediated Dilation Among Young Adults
Interventions
inositol-stabilized arginine silicate
Dietary Supplement
Lead sponsor
University of Arkansas, Fayetteville
Other
Eligibility
18 Years to 29 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Fayetteville, Arkansas
Source: ClinicalTrials.gov public record
Updated May 23, 2022 · Synced Sep 23, 2026, 4:05 PM EDT
Completed Phase 2 Interventional Results available

Citrulline in Severe Sepsis

NCT01474863
View directory record Official record
Conditions
Severe Sepsis, Acute Lung Injury
Interventions
High Dose Citrulline, Placebo, Low Dose Citrulline
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
13 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 4, 2017 · Synced Sep 23, 2026, 4:05 PM EDT
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 29, 2019 · Synced Sep 23, 2026, 4:05 PM EDT
Recruiting Phase 2 Interventional

Study to Improve Deployment Related Asthma by Using L-Citrulline Supplementation

NCT05259904
View directory record Official record
Conditions
Post Deployment Related Asthma, Asthma
Interventions
L-citrulline, Placebo
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 70 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 5, 2023 · Synced Sep 23, 2026, 4:05 PM 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 18, 2024 · Synced Sep 23, 2026, 4:05 PM 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 13, 2021 · Synced Sep 23, 2026, 4:05 PM 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 19, 2022 · Synced Sep 23, 2026, 4:05 PM 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 29, 2025 · Synced Sep 23, 2026, 4:05 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

A Clinical Study to Evaluate the Efficacy of Four Supplements on Improving Readiness for Intimacy

NCT05862519
View directory record Official record
Conditions
Libido, Intimacy, Gastrointestinal Issues
Interventions
Reset, Stay Ready Fiber, Libido, Testosterone supplement
Dietary Supplement
Lead sponsor
906 CMVI Holdings
Industry
Eligibility
18 Years to 44 Years · Male only
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated May 16, 2023 · Synced Sep 23, 2026, 4:05 PM 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 3, 2022 · Synced Sep 23, 2026, 4:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Examine the Effect of a Thermogenic Energy Drink in Healthy Adults

NCT05061797
View directory record Official record
Conditions
Metabolism
Interventions
Thermogenic Energy Drink - Active Study Product Formula, Placebo
Dietary Supplement
Lead sponsor
Rowdy Energy
Industry
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated May 1, 2022 · Synced Sep 23, 2026, 4:05 PM 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 9, 2015 · Synced Sep 23, 2026, 4:05 PM 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 22, 2006 · Synced Sep 23, 2026, 4:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Omics Profiling of Weight Loss With Bariatric Surgery

NCT02757638
View directory record Official record
Conditions
Obesity, Surgery
Interventions
Stable isotope infusion
Other
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Sep 29, 2025 · Synced Sep 23, 2026, 4:05 PM 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 9, 2024 · Synced Sep 23, 2026, 4:05 PM 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 23, 2026, 4:05 PM EDT
Terminated No phase listed Observational Results available

Observational Study That Will Collect Information on Patients With Urea Cycle Disorders (UCDs)

NCT01948427
View directory record Official record
Conditions
Urea Cycle Disorder
Interventions
Not listed
Lead sponsor
Amgen
Industry
Eligibility
Not listed
Enrollment
203 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2020
U.S. locations
1
States / cities
Blue Bell, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 30, 2024 · Synced Sep 23, 2026, 4:05 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Intravenous L-Citrulline to Treat Children Undergoing Heart Bypass Surgery : Revised Protocol

NCT01120964
View directory record Official record
Conditions
Atrial Septal Defect, Ventricular Septal Defect, Atrioventricular Septal Defect
Interventions
Intravenous L-Citrulline, Placebo of Intravenous L-Citrulline
Drug
Lead sponsor
Asklepion Pharmaceuticals, LLC
Industry
Eligibility
Up to 6 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
2
States / cities
St Louis, Missouri • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 26, 2022 · Synced Sep 23, 2026, 4:05 PM EDT
Completed Phase 1 Interventional

L-Citrulline Supplementation Pilot Study for Overweight Late Onset Asthmatics

NCT01715844
View directory record Official record
Conditions
Asthma
Interventions
L-citrulline
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 23, 2026, 4:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Markers of Atherosclerosis in Overweight, Postmenopausal Women Following Daily Watermelon Consumption

NCT04015544
View directory record Official record
Conditions
Postmenopausal, Overweight and Obesity
Interventions
Watermelon
Dietary Supplement
Lead sponsor
Appalachian State University
Other
Eligibility
50 Years to 75 Years · Female only
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Boone, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 10, 2019 · Synced Sep 23, 2026, 4:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

8 Weeks of L-CIT Supplementation and LIRET on Vascular Function in Hypertensive Postmenopausal Women

NCT05227781
View directory record Official record
Conditions
Hypertension, Menopause
Interventions
L-Citrulline, Placebo
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
50 Years to 75 Years · Female only
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Feb 6, 2022 · Synced Sep 23, 2026, 4:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dose-response Enteral Citrulline for Normal Healthy Volunteers and Surgery Patients

NCT00950976
View directory record Official record
Conditions
Nutritional Deficiency
Interventions
citrulline, Lemonade
Other
Lead sponsor
Société des Produits Nestlé (SPN)
Industry
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 24, 2012 · Synced Sep 23, 2026, 4:05 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Combined Grape Seed Extract and L-citrulline Supplementation on Hemodynamic Responses in Young Males

NCT05116150
View directory record Official record
Conditions
Dietary Supplementation
Interventions
Grape seed extract, Placebo
Dietary Supplement
Lead sponsor
California Baptist University
Other
Eligibility
18 Years to 30 Years · Male only
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Riverside, California
Source: ClinicalTrials.gov public record
Updated Nov 9, 2021 · Synced Sep 23, 2026, 4:05 PM 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 14, 2025 · Synced Sep 23, 2026, 4:05 PM EDT