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NCT02770105 · ClinicalTrials.gov registry record · NA
Theanine and Caffeine on Neurophysiology of Attention
A NA study of L-theanine, sponsored by Texas Tech University.
- Completed
- Registry status
- NA
- Development phase
- 9
- Enrollment target
- 1
- Study location
NCT02770105: Completed NA study of L-theanine, sponsored by Texas Tech University.
NCT02770105 is a NA study of L-theanine that has completed, run by Texas Tech University. The registered enrollment target is 9 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower). The trial reports 1 study location across 1 state. According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT02770105, a NA study of L-theanine, has completed, sponsored by Texas Tech University.
- COMPLETED
- Registry status
- NA
- Development phase
- 9 participants
- Enrollment target
- 1
- Study location
Study Summary
L-theanine and caffeine are nutritional compounds that are naturally found in tea. Our recent findings using an EEG paradigm are consistent with the findings of others, indicating that intake of L-theanine and caffeine reduce the time needed for a person to differentiate between two visual stimuli and react to only one stimulus. In order to understand how these compounds give rise to these improvements, the investigators need to study how these compounds are related to various areas of the brain. To achieve this, the investigators plan to scan the brains of nine participants after they take either 1) L-theanine alone, 2) caffeine alone 3) the combination of both L-theanine and caffeine as compared with a placebo (distilled water), to see which has the greatest impact on attention and on regions in the brain that bring about attention.
Primary Outcome
Theanine, caffeine, theanine-caffeine combination and distilled water (placebo) will be administered on 4 separate days (at least 5 days apart) in a random order. Functional MRI scans will be performed 60 minutes after each administration. Primary outcome measure will be the difference in fMRI BOLD responses obtained for each substance and the placebo.
Conditions Studied
Interventions
- OTHER Placebo
- OTHER Theanine
- OTHER Caffeine
- OTHER Theanine-Caffeine Combination
Study Locations (1)
Texas
- Texas Tech University - Department of Nutritional Sciences - Lubbock
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 9 participants |
| Start Date | 2016-05 |
| Est. Completion | 2016-06 |
| Phase | NA |
What the finished NCT02770105 record still lists
NCT02770105 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 9 participants, a relatively small participant target, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower).
The record links to 1 condition, with L-theanine appearing as the primary indexed condition, and to 4 interventions - of which Placebo is the first listed.
NCT02770105 reports a single indexed study location in Texas.
Frequently Asked Questions
What is clinical trial NCT02770105 about?
NCT02770105 is a clinical study titled "Theanine and Caffeine on Neurophysiology of Attention". L-theanine and caffeine are nutritional compounds that are naturally found in tea. Our recent findings using an EEG paradigm are consistent with the findings of others, indicating that intake of L-theanine and caffeine reduce the time needed for a person to differentiate between two visual stimuli a...
What is the current status of trial NCT02770105?
This trial is currently completed. It is a NA study. The enrollment target is 9 participants. The study started on 2016-05. Estimated completion is 2016-06.
What conditions does trial NCT02770105 study?
This clinical trial studies the following conditions: L-theanine.
What interventions are being tested in trial NCT02770105?
The interventions under investigation include: Placebo (OTHER), Theanine (OTHER), Caffeine (OTHER), Theanine-Caffeine Combination (OTHER).
Who is sponsoring clinical trial NCT02770105?
This trial is sponsored by Texas Tech University, which has 69 total clinical trials registered on ClinicalTrials.gov.
Where is trial NCT02770105 being conducted?
This trial has 1 study location across Texas. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT02770105's enrollment target sits among peer trials
9 1975th of 2000 higher than 25 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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