Morning Mastication Enhances Postprandial Glucose Metabolism in Healthy Young Subjects

The incremental area under the curve for glucose after a glucose tolerance test was significantly lower in the morning than in the evening.

• Mastication may influence insulin-mediated glucose metabolism differently at various times of the day.
• In a test with nine healthy male volunteers, mastication of rice with 40 chews led to a lower glucose response in the morning compared to the evening.
• Chewing 40 times in the morning significantly increased insulin secretion at 30 minutes after rice consumption, unlike in the evening.
• Chewing 10 times resulted in similar glucose responses in the morning and evening.
• These findings suggest that morning mastication could enhance early insulin secretion, potentially impacting obesity and type 2 diabetes risk.

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