- Relationship to Diabetes
- Type 1
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Glycemic Index for Bananas
The glycemic index (GI) of bananas varies depending upon how ripe the bananas are. This is because a lot of the carbohydrate in green bananas is in the form of a kind of resistant starch which we lack the enzyme to digest. As the fruit ripens, the starch is converted into readily available sugars.
One study of "under-ripe" bananas came up with a glycemic index of 30. One of "slightly under-ripe bananas" that were "yellow with green sections" produced a GI of 42, while another of "over-ripe" bananas was 52. However, most studies of bananas haven't specified the ripeness, and have come up with GIs ranging from 46 to 70. An average of 52 is usually assigned to bananas.