Diurnal postprandial responses to low and high glycaemic index mixed meals

Postprandial glucose levels varied significantly with time of day after both low and high glycaemic index meals, with p values of <0.001 and 0.003, respectively.

• Glycaemic responses were higher in the evening for low glycaemic index meals, with a trend towards significance (p = 0.06).
• Insulin responses did not show differences across the time of day.
• Low glycaemic index foods may have reduced effectiveness for glycaemic control in the evening compared to the morning.
• Eating later in the day could have a negative effect on metabolic health, regardless of the glycaemic index of the meal.

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