An intervention study investigating the effect of high-amylose brown rice consumption on blood glucose levels and its long-term feasibility.

An intervention study investigating the effect of high-amylose brown rice consumption on blood glucose levels and its long-term feasibility. - An intervention study investigating the effect of high-amylose brown rice consumption on blood glucose levels and its long-term feasibility.

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000058705

Enrollment

Registered

2025-08-05

Start date

2025-08-05

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

glucose abnormality

Interventions

Daily consumption (equal to or more than 1 serving/day) of high-amylose brown rice (Hoshinishiki) for four weeks Control

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: The persons aged 40-74 with HbA1c levels between 5.6% and 6.4%, based on a health checkup within the past year.

Exclusion criteria

Exclusion criteria: 1. Under treatment for diabetes 2. Regularly visiting a doctor without physician's approval 3. Rice allergy 4. Deemed unsuitable by the principal investigator or collaborating physician

Design outcomes

Primary

Measure	Time frame
blood glucose levels, HbA1c	—

Secondary

Measure	Time frame
Bowel movement frequency and stool characteristics	—

Countries

Japan

Contacts

Public ContactKoutatsu Maruyama

Ehime University Graduate School of Agriculture

kenkyu_madoguchi@ehimechn.org089-946-9960

Outcome results

None listed

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