Use of low-glycaemic index bread to reduce 24-h blood glucose: implications for dietary advice to non-diabetic and diabetic subjects
2006
Henry, C. J. K. | Lightowler, H. J. | Tydeman, E. A. | Skeath, R.
The present study investigated the effect of a simple dietary change on 24-h blood glucose. In a randomized cross-over design, 10 healthy subjects were prescribed a low-glycaemic-index (LGI) diet and a high-glycaemic-index (HGI) diet. The diets were identical with the exception of the type of bread consumed (LGI or HGI). Glucose concentrations over 24 h were measured using a continuous glucose monitoring system. The LGI diet resulted in a lower mean glucose response compared with the HGI diet over 24 h (P=0.135), during the day (P=0.171) and at night (P=0.100). Similarly, the 24-h, daytime and overnight incremental area under the curve for glucose following the LGI diet was consistently lower than following the HGI diet (P=0.093, P=0.132 and P=0.061, respectively). The results demonstrate how a very simple dietary change can favourably alter overall blood glucose concentrations. Such small modifications to the diet, if adopted in the long term, could improve glucose control and consequently reduce the risk of chronic disease in both diabetic and non-diabetic individuals.
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