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Credentialled Diabetes Educator (CDE), Diabetes Educator, Dietitian
The research into glycemic index showed that it was not just the ‘sugar’ content of foods that would predict the impact of a food on BGLs but the processing and type of starch was of equal importance. A good example of this is white bread. If you just considered the sugar content of white bread you would think it was fine for diabetes. We know however that white bread raises the blood glucose level almost at the same rate as drinking straight glucose (like in the oral glucose tolerance test). Some natural muesli cereal however will have a high ‘sugar’ content but these are generally naturally occurring sugars such a fructose. When tested in humans, most of these natural muesli cereals are low GI.
I now encourage people with diabetes to just think about the total amount of carbohydrate they are having and also the glycemic index of that food. An accredited practicing dietitian can prescribe the right amount carbohydrate individual to your needs.
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Dietitian
The reason you need to look at TOTAL carbohydrate is that ALL carbohydrates break down to glucose (the basic sugar that is the preferred energy source for your body) and so will raise your BGL, just at different rates based on what Sophie explained about the glycemic index. You can read more about the glycemic index here: http://www.glycemicindex.com/about.php
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