Abstract
BackgroundDietary sugar and starch affect plasma glucose and insulin concentrations. Little information is available about the effect of dietary fibre on plasma glucose and insulin concentration. It is hypothesized that different dietary fibre compositions will alter post-prandial glycaemic- and insulinemic index of test meals. The objective was to measure postprandial glucose and insulin concentrations in horses fed meals of different fibre compositions.MethodsBlood was drawn via jugular vein puncture and the glycaemic and insulinemic index were calculated.ResultsThe meal effect on glycaemic and insulinemic response followed the expected pattern, where plasma concentrations increased after feeding and declined after peak concentration. Glycaemic index was 100 (H), 102 (OB), 102 (BB) and 106 (M) and did not differ significantly between meals. Insulinemic index was 100 (H), 140 (OB), 121 (BB) and 125 (M) and did not differ significantly between meals.ConclusionsIn conclusion, meals containing different fibre compositions did not affect the glycaemic- and insulinemic index in horses.
Highlights
Dietary sugar and starch affect plasma glucose and insulin concentrations
Calculations The glycaemic and insulinemic responses are defined by the increment area under the plasma vs. time curve elicited by a meal
Area under the plasma glucose (AUCglucose) and insulin (AUCinsulin) curve was calculated by the trapezoidal method of numerical integration [4]
Summary
Dietary sugar and starch affect plasma glucose and insulin concentrations. Little information is avail‐ able about the effect of dietary fibre on plasma glucose and insulin concentration. It is hypothesized that different dietary fibre compositions will alter post-prandial glycaemic- and insulinemic index of test meals. The objective was to measure postprandial glucose and insulin concentrations in horses fed meals of different fibre compositions. A glycaemic index of human food was developed to classify sugar and starch containing foods based on their potential to raise post-prandial blood glucose concentrations, which could not be predicted by chemical food analysis [4]. Forages have gluconeogenic properties that contribute to a stable blood plasma glucose concentration This occurs through either glucose absorption in the small intestine or a continuous supply of glucose through hepatic gluconeogenesis where propionic acid from hindgut fibre fermentation is metabolised into glucose. The objective of the present experiment was to measure postprandial glucose and insulin concentrations in horses fed meals of various carbohydrate compositions. It was hypothesized that the different fibre compositions will alter the post-prandial glycaemic and/or insulinemic index of the test meals
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