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The glycemic index (GI) is a numerical system of measuring how much of a rise in circulating blood sugar a carbohydrate triggers -- the higher the number, the greater the blood sugar response.
So, a low GI food will cause a small rise, while a high GI food will tgrigger a dramatic spike.
High GI is 70 or more
Medium GI is 56 or 69 inclusive
Low GI is 55 or less
Madwoman Foods products labeled "Low Glycemic" are below 55 and normally below 10.