Services

GI Determination

GI Determination Standard protocol requires that ten normal subjects are studied on multiple occasions (maximum 3 per week) in the morning after an overnight fast. After a fasting blood sample is taken, subjects eat a test meal containing 50g available carbohydrate and have further blood samples at 15, 30, 45, 60, 90 and 120 minutes after starting to eat. Capillary blood is obtained by finger-prick and whole blood glucose determined on-site with an automatic analyzer using the glucose oxidase method.

Each subject conducts one trial of each test food and 3 trials of the reference food. The reference food can be anhydrous glucose or white bread (analyzed so its composition is exactly known). If large numbers of foods are being tested, a reference food trial should be done for every 6-7 test foods. This ensures that there are no changes in subject's glucose responses with time.

Blood samples are analyzed at our facility by our laboratory technicians. The resulting glucose values are used to calculate the Glycemic Index.

Our GI protocol exceeds the standards set by the World Health Organization.

Glycemic Response We have developed protocols for situations where foods are not appropriate for GI testing or a direct comparison of different ingredients is desired .Our senior scientists would be pleased to discuss your specific requirements.