Effect of low-caffeine green tea against sleep and stress in the elderly

Effect of low-caffeine green tea against sleep and stress in the elderly - Sleep and stress in the elderly

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000016533

Enrollment

Registered

2015-02-22

Start date

2015-02-22

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

Sleep, Stress

Interventions

Low-caffeine green tea, 5 cups/day, for 2 weeks

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: The elderly in the care home "Arrangement Care Sakuragaoka" Obtained written informed consent from the elderly before the participation Possible to take green tea for 3 weeks Possible to measure brain waves for 6 days Possible to check salivary amylase activity two times daily for 3 weeks

Exclusion criteria

Exclusion criteria: Taking sleep-inducing drug and tranquilizer Smoker Diagnosed as inadequate to participate in the study by a doctor

Design outcomes

Primary

Measure	Time frame
Alterations in brain waves and salivary amylase activity in the elderly that drank low-caffeine green tea.	—

Secondary

Measure	Time frame
Physical condition, Sleeping time, Replying to a questionnaire (subjective stress)	—

Countries

Japan

Contacts

Public ContactKeiko Unno

University of Shizuoka School of Pharmaceutical Sciences

unno@u-shizuoka-ken.ac.jp054-264-5731

Outcome results

None listed

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