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Showing 1–24 of 77 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Glycine Clear all
Completed Phase 2 Interventional Results available

Rilonacept to Improve Artery Function in Patients With Atherosclerosis

NCT00417417
View directory record Official record
Conditions
Coronary Artery Disease, Atherosclerosis, Inflammation, Endothelial Dysfunction
Interventions
Rilonacept, Placebo
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 29, 2012 · Synced Sep 1, 2026, 11:45 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 1, 2026, 11:45 AM EDT
Completed Phase 2 Interventional Results available

Safety and Effectiveness of D-serine in Schizophrenia

NCT00322023
View directory record Official record
Conditions
Schizophrenia
Interventions
D-serine
Drug
Lead sponsor
Nathan Kline Institute for Psychiatric Research
Other
Eligibility
18 Years to 60 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
3
States / cities
New Haven, Connecticut • Glen Oaks, New York • Orangeburg, New York
Source: ClinicalTrials.gov public record
Updated Oct 4, 2020 · Synced Sep 1, 2026, 11:45 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

A Repeat Dose Study With GSK1018921 to Assess Safety, Tolerability, Pharmacokinetics, Pharmacodynamics in Healthy Volunteers and Patients With Schizophrenia and to Evaluate Its Effect on PK of Midazolam.

NCT00929370
View directory record Official record
Conditions
Schizophrenia
Interventions
Glycine Transporter-1 inhibitor
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 55 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
2
States / cities
Glendale, California • Bellaire, Texas
Source: ClinicalTrials.gov public record
Updated Jun 28, 2009 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Phase 1Phase 2 Interventional

Project 2 Airway Potential Hydrogen (pH) in Asthma

NCT03617718
View directory record Official record
Conditions
Cystic Fibrosis, Asthma, Severe Persistent Asthma, Healthy
Interventions
Glycine Buffer
Drug
Lead sponsor
Case Western Reserve University
Other
Eligibility
18 Years to 50 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2025
U.S. locations
2
States / cities
Indianapolis, Indiana • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 14, 2025 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Creatine Kinetics, Synthesis From Glycine and Response to Creatine and Amino Acid Supplement in Healthy Humans

NCT01725503
View directory record Official record
Conditions
Creatine Synthesis in Healthy Subjects
Interventions
Creatine and Amino Acid supplement
Dietary Supplement
Lead sponsor
The Cleveland Clinic
Other
Eligibility
20 Years to 35 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 29, 2014 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Phase 2 Interventional Results available

Study to Evaluate the Efficacy and Safety of Leronlimab for Mild to Moderate COVID-19

NCT04343651
View directory record Official record
Conditions
Coronavirus Disease 2019
Interventions
Placebo, Leronlimab (700mg)
Drug
Lead sponsor
CytoDyn, Inc.
Industry
Eligibility
18 Years to 99 Years
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
12
States / cities
Los Angeles, California • Palm Springs, California • Rancho Mirage, California + 9 more
Source: ClinicalTrials.gov public record
Updated Jan 3, 2023 · Synced Sep 1, 2026, 11:45 AM EDT
Terminated Phase 2 Interventional Results available

A Randomized Double-Blind Control-Comparison Crossover Trial of Oral Glutamine to Suppress Frequently Recurrent Herpes Labialis

NCT00913692
View directory record Official record
Conditions
Herpes Labialis, Herpes Simplex Virus
Interventions
Glutamine, Glycine
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 10, 2012 · Synced Sep 1, 2026, 11:45 AM EDT
Recruiting Early Phase 1 Interventional

Synaptic Mechanisms of Continuous Theta Burst Stimulation in Depression

NCT07560878
View directory record Official record
Conditions
Major Depression
Interventions
D-Cycloserine (DCS), Continuous theta-burst stimulation (cTBS), Transcranial Magnetic Stimulation Sham, Memantine, Lorazepam (drug), Baclofen, Placebo
Drug · Device
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Sep 1, 2026, 11:45 AM EDT
Enrolling by invitation Phase 2 Interventional Accepts healthy volunteers

Determining Airway pH by Compartmental Exhaled Nitric Oxide Levels During Alkaline Buffer Challenge

NCT04738422
View directory record Official record
Conditions
Airway Disease
Interventions
Alkaline glycine
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 60 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2028
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Dec 8, 2025 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety and Pharmacokinetics of NRX-1074 in Normal Volunteers

NCT01856556
View directory record Official record
Conditions
Healthy
Interventions
NRX-1074, Placebo
Drug
Lead sponsor
Naurex, Inc, an affiliate of Allergan plc
Industry
Eligibility
18 Years to 55 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Pasadena, California
Source: ClinicalTrials.gov public record
Updated Jan 25, 2016 · Synced Sep 1, 2026, 11:45 AM EDT
Terminated Phase 2 Interventional

Phase II Study of Treatment for HPV16+ ASC-US, ASC-H and LSIL

NCT03911076
View directory record Official record
Conditions
ASC-US, ASC-H, LSIL
Interventions
PVX-2, Placebo
Biological · Other
Lead sponsor
PapiVax Biotech, Inc.
Other
Eligibility
25 Years to 70 Years · Female only
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
6
States / cities
Port Saint Lucie, Florida • Newark, New Jersey • Fairfield, Ohio + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 16, 2024 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Glutathione and Fuel Oxidation in Aging

NCT01870193
View directory record Official record
Conditions
Aging
Interventions
Glycine, cysteine (as n-acetylcysteine), alanine
Dietary Supplement
Lead sponsor
Rajagopal V Sekhar
Other
Eligibility
21 Years to 80 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 14, 2023 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Glycine and Oral D-Cycloserine in Alcoholic Patients and Healthy Subjects

NCT00635102
View directory record Official record
Conditions
Alcohol Dependence
Interventions
D-Cycloserine PO and Glycine IV, Placebo D-Cycloserine PO and placebo Glycine IV, Placebo D-Cycloserine PO and Glycine IV, D-Cycloserine PO and placebo Glycine IV
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 70 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 2008
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 15, 2016 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Poweroff Sleep Study

NCT03364101
View directory record Official record
Conditions
Sleep
Interventions
Placebo Capsule, POWEROFF Capsule
Dietary Supplement
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 21, 2018 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Not applicable Interventional

Adjunctive Glycine for Obsessive Compulsive Disorder

NCT00405535
View directory record Official record
Conditions
Obsessive Compulsive Disorder
Interventions
glycine, placebo
Drug · Other
Lead sponsor
Nathan Kline Institute for Psychiatric Research
Other
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Orangeburg, New York
Source: ClinicalTrials.gov public record
Updated Dec 15, 2016 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Acute Glycine Pharmacodynamic Study

NCT01610011
View directory record Official record
Conditions
Schizophrenia, Psychotic Disorders
Interventions
Glycine administration
Dietary Supplement
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 55 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 26, 2015 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pharmacokinetic Profile of N-Acetyl Cysteine

NCT06252519
View directory record Official record
Conditions
Pharmacokinetics
Interventions
NAC, Neuro-NAC, Neuro-NAC XS
Dietary Supplement
Lead sponsor
University of Memphis
Other
Eligibility
18 Years to 45 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 15, 2024 · Synced Sep 1, 2026, 11:45 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 1, 2026, 11:45 AM EDT
Completed Phase 2 Interventional

Glycine to Treat Psychotic Disorders in Children

NCT00005658
View directory record Official record
Conditions
Psychotic Disorder, Schizoaffecitve Disorder, Schizophrenia
Interventions
Glycine
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
Not listed
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2002
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Phase 2 Interventional Results available

The Effects of Tiopronin on 3-Aminopropanal Level & Neurologic Outcome After Aneurysmal Subarachnoid Hemorrhage

NCT01095731
View directory record Official record
Conditions
Aneurysmal Subarachnoid Hemorrhage
Interventions
Tiopronin, Placebo
Drug
Lead sponsor
E. Sander Connolly
Other
Eligibility
21 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
3
States / cities
Gainesville, Florida • New York, New York • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Oct 28, 2025 · Synced Sep 1, 2026, 11:45 AM EDT
Completed Not applicable Interventional

A Study of the Effects of Sarcosine on Symptoms and Brain Glycine Levels in People With Schizophrenia

NCT00538070
View directory record Official record
Conditions
Schizophrenia
Interventions
Sarcosine
Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
2
States / cities
Belmont, Massachusetts • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 17, 2012 · Synced Sep 1, 2026, 11:45 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Pilot Study: Impact of Biomarker-Guided Dietary Supplementation on Quality-of-Life Measures in Subjects With Chronic Pain

NCT06247813
View directory record Official record
Conditions
Chronic Pain
Interventions
Inflammation Support Formula, Nerve Health Formula, Redox Support Formula
Dietary Supplement
Lead sponsor
Ethos Research & Development
Industry
Eligibility
18 Years to 75 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Newport, Kentucky
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 1, 2026, 11:45 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Prandial Metabolic Phenotype in Adults

NCT05400733
View directory record Official record
Conditions
Protein Metabolism
Interventions
Total Amino Acids, Essential Amino Acids, Essential Amino Acids + Hydroxy-methylbutyric acid (HMB), Essential Amino Acids + Leucine, Essential Amino Acids High, Placebo Water
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
60 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Sep 1, 2026, 11:45 AM EDT