Most, but not all varieties of potatoes have a high glycemic index.[1][2][3] For example, the varieties ‘Carisma’ and ‘Nicola’ have a low and medium glycemic index, respectively.[1] Frying or cooling potatoes after cooking typically reduces their glycemic index.[2] Yet don’t count on frying potatoes to improve their healthfulness, as fried potatoes are less filling per calorie,[4] associated with weight gain,[5] and associated with a higher risk of developing diabetes and cardiovascular disease.[6][7]
Do all potatoes have a high glycemic index?
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•Last Updated: May 16, 2025
Most potato varieties have a high glycemic index, but some, like Carisma and Nicola, have lower values. Cooking methods such as frying or cooling can affect the glycemic index, but fried potatoes are associated with negative health outcomes.