The impact on human by nature

Impact of chemical derived from plants on human immune system

Status

Recruiting

Phases

Phase 1

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCT1040250007

Enrollment

Registered

2025-04-28

Start date

2025-04-28

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

Healty person Immune system

Interventions

Inhalation of plant-derived chemicals by wearing masks impregnated with plant-derived chemicals or by staying in a space sprayed with them for a specified period of time

Air quality, Chemical derived from plants, exposure

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. A healthy person 2. Person with normal blood pressure

Exclusion criteria

Exclusion criteria: 1. Those who have underlying illness 2. Those who take more than 120 mL of blood within 4 week 3. Those who is judged as an inappropiated person for tests by doctor

Design outcomes

Primary

Measure	Time frame
Effects (number and activity) on immune cells such as NK cells before and after the test	—

Secondary

Measure	Time frame
Change in cytokines or stress hormone before and after the test	—

Contacts

Public ContactTakeo Saito

Fujita Health University

saitou@fujita-hu.ac.jp+81-562-93-9094

Outcome results

None listed

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