Clinical study on pharyngeal retention of tea catechins

Clinical study on pharyngeal retention of tea catechins - Pharyngeal retention of tea catechins

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000037474

Enrollment

Registered

2019-07-31

Start date

2019-07-25

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

None

Interventions

1 day 57 mg tea catechins once a day

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: (1)Healthy adults between 20 and 65 years old (2)Able to provide written informed consent (3)Able to intake and gargle test product (4)Able to write questionnaire

Exclusion criteria

Exclusion criteria: (1)Potentially having the allergy or side effects to tea-derived components (2)Having injury or inflammation in the oral cavity or pharynx (3)Being treated for liver, kidney, heart, respiratory, endocrine or metabolic, systemic immune, systemic infectious or other diseases (4)Not able to stop taking food or supplements containing tea catechins (5)Going to participate any clinical trial other than this study (6)Judged as ineligible for this study

Design outcomes

Primary

Measure	Time frame
Amount of catechins in the swabbing solution before and after the intake of the test product	—

Secondary

Measure	Time frame
Antiviral activity in the swabbing solution before and after the intake of the test product	—

Countries

Japan

Contacts

Public ContactDaisuke Furushima

University of Shizuoka School of Pharmaceutical Sciences

dfuru@u-shizuoka-ken.ac.jp+81-54-264-5591

Outcome results

None listed

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