Aims: There is no standardized protocol for measuring glycemic index (GI) that takes time-of-day eff ects intoaccount. The software DegifXL2 and Medtronic-Minimed's CGMSTM and Solutions TM, makes the GI calculationat breakfast and dinner time possible. The aim of this study was to assess the enhanced data processing software(DegifXL4) enabling the GI calculation at breakfast, lunch, afternoon snack and dinner times. Methods: The glucose levels of 20 healthy volunteers were monitored after they consumed either 50 g of glucoseor one of ten alternative foodstuff s either for breakfast and dinner or for lunch or snack. Within the 9-day test period,10 such meals were monitored in 3 replicates for each volunteer. Specifi cally, CGMSTM was used to monitor plasmaglucose levels at 5-minute intervals for a period of 120 min following the foodstuff ingestion. Results: Using the enhanced spreadsheed DegifXL 4, a total of 640 profi les were obtained and 491 (77 %) accomplishedthe criteria for further processing. The percentage of successful tests in each foodstuff varied from 57 to87 %. Conclusions: The use of the new software DegifXL4 off ers accurate GI estimates for foodstuff s eaten for breakfast,lunch, snacks and dinners in three replicates. In combination with the CGMS Solutions SoftwareTM is DegifXL4 anenhanced effi cient and comfortable way to routinely measure GI values.

Department of Physiology and 2nd Department of Medicine Faculty of Medicine and Dentistry Palacky University Olomouc

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