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Showing 1–6 of 6 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Completed Not applicable Interventional Accepts healthy volunteers

The Poweroff Sleep Study

NCT03364101
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
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Supplements on Stress Markers

NCT05592561
Conditions
Physiological Stress
Interventions
mental stress task
Other
Lead sponsor
Texas State University
Other
Eligibility
18 Years to 40 Years
Enrollment
109 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
San Marcos, Texas
Conditions
Mental Fatigue
Interventions
Caffeine Blend, Sugar Pill
Dietary Supplement · Other
Lead sponsor
University of Mary Hardin-Baylor
Other
Eligibility
18 Years to 25 Years · Male only
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Belton, Texas
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of the Amino Acid L-Theanine on Alertness and Vigilance

NCT01851122
Conditions
Theanine, (L)-Isomer
Interventions
L-theanine capsule, Placebo capsule
Dietary Supplement
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Sugar Land, Texas
Conditions
Attention Deficit Hyperactivity Disorder (ADHD), Autism Spectrum Disorder (ASD)
Interventions
L-theanine and paraxanthine, Placebo
Dietary Supplement
Lead sponsor
Texas Tech University Health Sciences Center
Other
Eligibility
Male only
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Lubbock, Texas
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Effects of L-theanine on Motor Cortex Excitability in Healthy Subjects: A Paired-Pulse TMS Study

NCT04749745
Conditions
Cortical Excitability, Psychiatric Disorder
Interventions
L-theanine, Placebo
Drug
Lead sponsor
Butler Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Providence, Rhode Island