Study on the effect of Japanese black tea on suppressing postprandial blood glucose and insulin levels (Randomized Crossover Trial)

Study on the effect of Japanese black tea extract in suppressing postprandial blood glucose and insulin levels (Randomized Crossover Trial) - Study on the effect of Japanese black tea extract in suppressing postprandial blood glucose and insulin levels (Randomized Crossover Trial)

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000060341

Enrollment

Registered

2026-01-13

Start date

2026-02-01

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

Adult Men and Women with High Postprandial Blood Glucose Levels

Interventions

Test food intake - washout - placebo food intake Placebo food intake - washout - Test food intake

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1.A healthy young women 2.Subjects whose postprandial blood glucose peaks were higher than the median for all subjects.

Exclusion criteria

Exclusion criteria: 1.Subjects with a history of diabetes 2.Subjects with fasting blood glucose levels of 126 mg/dL or higher 3.Subjects who regularly use medications, 'Food for Specified Health Uses', 'Foods with Functional Claims'that may affect blood glucose levels 4.Subjects who are pregnant or willing to be pregnant or breast-feeding during this study

Design outcomes

Primary

Measure	Time frame
1.Postprandial blood glucose levels and area under the curve 2. Postprandial blood insulin levels and area under the curve	—

Countries

Japan

Contacts

Public ContactMihoko Moto

Wayo Women's University Department of Health and Nutrition

moto@wayo.ac.jp047-371-2393

Outcome results

None listed

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