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NCT04491461 · ClinicalTrials.gov registry record · NA
Acute Effects of an Herbal Tea on Immune Surveillance and Activation.
A NA study, sponsored by Natural Immune Systems.
- Completed
- Registry status
- NA
- Development phase
- 12
- Enrollment target
NCT04491461: Completed NA study, sponsored by Natural Immune Systems.
NCT04491461 is a NA study that has completed, run by Natural Immune Systems. The registered enrollment target is 12 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT04491461, a NA study, has completed, sponsored by Natural Immune Systems.
- COMPLETED
- Registry status
- NA
- Development phase
- 12 participants
- Enrollment target
Study Summary
A small cross-over trial on 24 people involving an herbal tea blend to test whether consuming 1 cup of tea triggers changes in the numbers of natural killer cells in the blood circulation as evidence of immune cell trafficking within 2 hours.
Primary Outcome
Flow cytometry evaluation of natural killer cell numbers
Interventions
- DIETARY_SUPPLEMENT Herbal tea blend
- DIETARY_SUPPLEMENT Warm water
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 12 participants |
| Start Date | 2020-07-27 |
| Est. Completion | 2021-12-19 |
| Phase | NA |
What the finished NCT04491461 record still lists
NCT04491461 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 12 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 0 conditions, and to 2 interventions - of which Herbal tea blend is the first listed.
NCT04491461 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT04491461 about?
NCT04491461 is a clinical study titled "Acute Effects of an Herbal Tea on Immune Surveillance and Activation.". A small cross-over trial on 24 people involving an herbal tea blend to test whether consuming 1 cup of tea triggers changes in the numbers of natural killer cells in the blood circulation as evidence of immune cell trafficking within 2 hours.
What is the current status of trial NCT04491461?
This trial is currently completed. It is a NA study. The enrollment target is 12 participants. The study started on 2020-07-27. Estimated completion is 2021-12-19.
What interventions are being tested in trial NCT04491461?
The interventions under investigation include: Herbal tea blend (DIETARY_SUPPLEMENT), Warm water (DIETARY_SUPPLEMENT).
Who is sponsoring clinical trial NCT04491461?
This trial is sponsored by Natural Immune Systems, which has 17 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT04491461's enrollment target sits among peer trials
12 1913th of 2000 higher than 74 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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