Effects of Tea ingestion on COVID-19

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCT1050220067

Enrollment

Registered

2022-07-26

Start date

2022-07-26

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

SARS-CoV2 Infection SARS-CoV2

Interventions

Subjects who give informed consent receive one of the following test beverage (#1 to 3) according to the classification. #1 Green tea: "Ohi Ocha Koi Cha 600 mL (ITO EN. LTD.), 2 bottles per day (for 4

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1 Patients who test positive for SARS-CoV2 by PCR or antigen quantification (including both inpatients and outpatients). 2 Patietns who give written consent for enrollment in the study (including both male and femail). 3 Patients aged 20 to 75 at the time of the informed consent.

Exclusion criteria

Exclusion criteria: 1 Patients who are diagnosed as having a decline in cognitive ability by a doctor. 2 Patients who are made ineligible for the study by a doctor.

Design outcomes

Primary

Measure	Time frame
Change in symptoms (body temperature, SpO2, complaints)	—

Secondary

Measure	Time frame
Change in viral RNA quantity in nasopharyngeal swab.	—

Contacts

Public ContactOsam Mazda

Kyoto Prefectural University of Medicine

mazda@koto.kpu-m.ac.jp+81-75-251-5329

Outcome results

None listed

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