Verification test on blood flow improvement effect by ingestion of black tea

Verification test on blood flow improvement effect by ingestion of black tea - Verification test on blood flow improvement effect by ingestion of black tea

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000029949

Enrollment

Registered

2017-11-13

Start date

2018-01-20

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

Healthy adult

Interventions

Capsules containing black tea (test capsules) Capsules not containing black tea (placebo capsules)

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Healthy subject

Exclusion criteria

Exclusion criteria: 1) Subjects who are under medication or having a history of serious diseases for which medication was required. 2) Subjects who may be pregnant or possible pregnant. 3) Subjects who are lactating. 4) Subjects who are unsuitable for the entry judged by a doctor

Design outcomes

Primary

Measure	Time frame
Measuring blood flow and body surface temperature at before cooling stress and after 10, 20 and 30 minutes after cooling stress.	—

Countries

Japan

Contacts

Public ContactNaoko Takamizawa

Waseda University (Graduate School) Integrated Institute for Regulatory Science, Research Organization for Nano & Life Innovation

takamizawa.n@aoni.waseda.jp03-5369-7326

Outcome results

None listed

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