Effects of L-theanine and Caffeine on Attention and Attention-related Brain Activity of Children With Attention Deficit Hyperactivity Disorder
Public ClinicalTrials.gov record NCT03533556. 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.
Official title
Effects of L-theanine and Caffeine on Attention and Attention-related Brain Activity of Male Children and Adolescents With Attention Deficit Hyperactivity Disorder: a proof-of- Concept fMRI Study.
Study identification
- NCT ID
- NCT03533556
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Early Phase 1
- Lead sponsor
- Texas Tech University
- Other
- Enrollment
- 6 participants
Conditions and interventions
Conditions
Interventions
- L-theanine Dietary Supplement
- Caffeine Dietary Supplement
- L-theanine-Caffeine Combination Dietary Supplement
- Placebo Other
Dietary Supplement · Other
Eligibility (public fields only)
- Age range
- 8 Years to 17 Years
- Sex
- Male
- 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
- May 13, 2018
- Primary completion
- Aug 30, 2018
- Completion
- Aug 30, 2018
- Last update posted
- Apr 11, 2019
2018
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Texas Tech University - Department of Human Development and Family Studies | Lubbock | Texas | 79409 | — |
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 NCT03533556, 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 Apr 11, 2019 · Synced Jun 26, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT03533556 live on ClinicalTrials.gov.