Brown Rice vs. White Rice: Impact of Glycemic Index on Sleepiness

Brown Rice vs. White Rice: Impact of Glycemic Index on Sleepiness - BR-WR GID Study

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000056929

Enrollment

Registered

2025-02-04

Start date

2024-05-08

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

Post-meal Sleepiness

Interventions

Brown rice diet White rice diet

Eligibility

Sex/Gender

Female

Inclusion criteria

Inclusion criteria: Students from the Department of Human Nutrition at Tokyo Kasei Gakuin University Individuals with a BMI of 18.5 to 24.9

Exclusion criteria

Exclusion criteria: Individuals with sleep disorders Individuals currently receiving medical treatment (regardless of diagnosis) Individuals with a habit of skipping breakfast Individuals who have taken medication within 24 hours of the study day

Design outcomes

Primary

Measure	Time frame
Sleepiness: Stanford Sleepiness Scale	—

Countries

Japan

Contacts

Public ContactMitsuhiko Yamada

Tokyo Kasei Gakuin University Department of Pathophysiology, School of Human Nutrition

yamada.mitsuhiko@kasei-gakuin.ac.jp03-3262-2563

Outcome results

None listed

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