Healthy
Conditions
Interventions
Ingestion of a candy containing green tea for 5 minutes
Ingestion of a candy containing black tea for 5 minutes
Ingestion of a candy containing neither green tea nor black tea for 5 minutes
Sponsors
Kyoto Prefectural University of Medicine
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Healthy volunteers who has no symptoms and do not receive an administration of immunosuppressants including corticosteroid. 2. Patients who voluntarily participate in the study and give written consent. 3. Patients aged 20 years old or above and 75 years old or younger at the time of consent.
Exclusion criteria
Exclusion criteria: 1. Patients with severe disease (inducing patients who receive an administration of immunosuppressants including corticosteroid). 2. Patients with history of either liver or kidney disease. 3. Patients allergic for either tea or catechins. 4. Patients whom the doctor in attendance considers inadequate for the study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Viral inactivation effects in saliva before ingestion of a candy containing tea-derived components and 0, 5 and 15 min after cessation of the candy ingestion. | — |
Secondary
| Measure | Time frame |
|---|---|
| Concentrations of catechin-related components in the saliva before ingestion of a candy containing tea-derived components and 0, 5 and 15 min after cessation of the candy ingestion. And viral RNA levels of SARS-CoV-2 treated with the saliva samples. | — |
Countries
Japan
Contacts
Public ContactOsam Mazda
Kyoto Prefectural University of Medicine Department of Immunology
Outcome results
None listed