The Effect of the Amino Acid L-Theanine on Alertness and Vigilance
Public ClinicalTrials.gov record NCT01851122. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Study identification
- NCT ID
- NCT01851122
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Lead sponsor
- The University of Texas Health Science Center, Houston
- Other
- Enrollment
- 26 participants
Conditions and interventions
Conditions
Interventions
- L-theanine capsule Dietary Supplement
- Placebo capsule Dietary Supplement
Dietary Supplement
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Oct 31, 2011
- Primary completion
- Sep 30, 2012
- Completion
- Sep 30, 2012
- Last update posted
- Dec 12, 2023
2011 – 2012
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Physicians at Sugar Creek | Sugar Land | Texas | 77478 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01851122, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Dec 12, 2023 · Synced May 18, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01851122 live on ClinicalTrials.gov.