Effectiveness of combined use of theanine and arginine for psychological stress

Effectiveness of combined use of theanine and arginine for psychological stress - Effectiveness of combined use of theanine and arginine for psychological stress

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000040967

Enrollment

120

Registered

2020-07-01

Start date

2020-01-01

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 person

Interventions

Theanine drink Theanine-arginine drink placebo

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Being able to take barley tea Capable of collecting saliva

Exclusion criteria

Exclusion criteria: Those taking antihypertensive drugs, stimulants, anxiolytics

Design outcomes

Primary

Measure	Time frame
salivary alpha-amylase activity	—

Countries

Japan

Contacts

Public ContactDaisuke Furushima

University of Shizuoka School of Pharmaceutical Science

dfuru@u-shizuoka-ken.ac.jp054-264-5591

Outcome results

None listed

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