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Effects of green tea gargling on coronavirus disease-2019: A randomized controlled trial

Effects of green tea gargling on coronavirus disease-2019: A randomized controlled trial - Prevention of coronavirus disease-2019 by green tea gargling

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000052116
Enrollment
1100
Registered
2023-09-15
Start date
2023-10-01
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

coronavirus disease-2019

Interventions

12 weeks, Active drink, green tea three times a day 12 weeks, Control-drink, water three times a day

Sponsors

University of Shizuoka
Lead Sponsor
Laboratory of Animal Physiology, School of Agriculture, Meiji University Faculty of Medicine School of Health Science, Kagoshima University White Cross Society Seirei Hamamatsu General Hospital Central Research Institute, ITO EN, Ltd.
Collaborator

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: (1)18-70 years old, Men and women, (2)Able to give written informed consent (3)Able to gargle and to write questionnaire

Exclusion criteria

Exclusion criteria: (1)Potentially having the allergy to green tea (2)Having dysphagia (3)Having severe systemic chronic infectious diseases (4)Subjects diagnosed by physicians inappropriate to participate in the study

Design outcomes

Primary

MeasureTime frame
The occurrence of coronavirus disease-2019

Secondary

MeasureTime frame
(1)The occurrence of influenza (2)The occurrence of upper respiratory tract infections (3)Term from when clinical trial starts to when infections occur (4)Severity of symptoms (5)Number of occurrence (6)Complications (7)Adverse events

Countries

Japan

Contacts

Public ContactHiroshi Yamada

University of Shizuoka School of Pharmaceutical Sciences

hyamada@u-shizuoka-ken.ac.jp+81-54-264-5762

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026