Abstract
The purpose of this study was to examine how gold kiwifruit pericarp (pericarp is defined as the skin of the fruit) consumption and the timing thereof affect the postprandial blood glucose profile. The study was conducted on twelve healthy volunteers (six men and six women). According to our results, the simultaneous intake of gold kiwifruit with bread and the prior intake of gold kiwifruit evidently suppressed the postprandial blood glucose elevation compared with exclusive bread intake. There was no significant difference in postprandial blood glucose changes between the ingestion of gold kiwifruit pericarp and pulp and that of gold kiwifruit pulp only. The highest postprandial blood glucose elevation was suppressed by 27.6% and the area under the blood glucose elevation curve by 29.3%, even with the exclusive ingestion of gold kiwifruit pulp. We predicted that the ingestion of both the pericarp and pulp of gold kiwifruit would reduce the postprandial blood glucose elevation to a greater extent than that of gold kiwifruit pulp only; however, there was no significant difference between the two. These results indicate that gold kiwifruit consumption significantly suppresses the postprandial blood glucose elevation regardless of pericarp presence or absence and the timing of ingestion.
Highlights
According to the 2016 National Health and Nutrition Survey, the total number of people with diabetes and those in the preparatory group for diabetes is reported to be approximately 20 million [1]
We reported that drinking vegetable juice before or with a carbohydrate-based meal attenuated the elevation of postprandial blood glucose levels [11]
This study demonstrated that the simultaneous intake of gold kiwifruit with bread (BPK and BWK groups) and prior intake (PK30B and WK30B groups) both refer to the suppressed postprandial blood glucose elevation compared to the intake of bread alone
Summary
According to the 2016 National Health and Nutrition Survey, the total number of people with diabetes and those in the preparatory group for diabetes is reported to be approximately 20 million [1]. Scientifically known as Actinidia deliciosa, is cultivated in temperate to subtropical regions and is a fruit that can be obtained at low cost throughout the year. It is of high value because it contains abundant nutrients, such as dietary fiber, vitamin C, and potassium. A confirmation of the impact of kiwifruit pericarp on the suppression of the blood glucose elevation in the postprandial blood glucose profile may contribute to the management of lifestyle-related diseases, as a recommended dietary and nutritional guidance component
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