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  • Q&A with Australian Health Practitioners

    What determines whether a food is high or low GI?

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  • The Glycemic Index Foundation (GIF) is a not-for-profit company supported by The University of Sydney and JDRF (Australia). GIF is committed to providing Australians with … View Profile

    Many factors can influence the GI value of a food including the physical state of a food (i.e., how it’s been processed), its fat content, acidity, the type of sugar, type of starch, particle size, etc…
    Highly processed carbohydrate foods (‘convenience’ foods) tend to have high GI values because processing makes the sugars or starches more easily digestible and consequently they are quickly absorbed into the bloodstream. For example, finely milled white flour breads have a high GI compared to traditional wholegrain breads.

    A simple way to tell if a food is low GI is to look for the GI Symbol on the supermarket shelves or do a search on our website for those products that carry the symbol. Scientists have tested the GI value of these products to ensure they are low GI. You will find a comprehensive list of foods tested using real people and real food at

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