4.5 Article

Apple preload increased postprandial insulin sensitivity of a high glycemic rice meal only at breakfast

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EUROPEAN JOURNAL OF NUTRITION
卷 -, 期 -, 页码 -

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SPRINGER HEIDELBERG
DOI: 10.1007/s00394-022-03079-4

关键词

Apple preload; Early supper; Glycemic response; Insulin; Satiety

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The study aimed to investigate the impact of an apple preload on insulin sensitivity. The results showed that the apple preload reduced blood glucose peak values during breakfast, lunch, and supper, and increased insulin sensitivity during breakfast. Breakfast had the best effect in terms of enhancing insulin sensitivity.
Purpose The possible impact of preload food on insulin sensitivity has yet been reported. This study aimed to investigate the glycemic and insulinemic effect of an apple preload before breakfast, lunch and early supper, based on high glycemic index (GI) rice meals. Methods Twenty-three healthy participants in Group 1 and 14 participants in Group 2 were served with the reference meal (white rice containing 50 g of available carbohydrate) or experimental meals (apple preload and rice, each containing 15 and 35 g of available carbohydrate). The meals were either served at 8:00 for breakfast, 12:30 for lunch or 17:00 for early supper to explore the possible effect of time factor. The group 1 assessed the postprandial and subsequent-meal glycemic effect of the test meals by continuous glucose monitoring (CGM), along with subjective appetite; The group 2 further investigated the glycemic and insulin effect by blood collection. Results The apple preload lowered the blood glucose peak value by 33.5%, 31.4% and 31.0% in breakfast, lunch and supper, respectively, while increased insulin sensitivity by 40.5% only at breakfast, compared with the rice reference. The early supper resulted significantly milder glycemic response than its breakfast and lunch counterparts did. The result of CGM tests was consistent with that of the fingertip blood tests. Conclusion Apple preload performed the best at breakfast in terms of enhancing the insulin sensitivity. The preload treatment could effectively attenuate postprandial GR without increasing the area under insulin response curve in any of the three meals.

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