An easy way to lower their carbohydrates and impact on blood sugar.
Cook them.
Refrigerate or freeze them.
Reheat them.
Eat them.
Voilà!
This seems to work well with rice, potatoes, sweet potatoes, pasta, beans, and more open_in_new.
Tips:
Freezing and toasting your bread open_in_new and letting your toast cool before eating may also have a lower glycemic impact.
The greener a banana, the more resistant its starches as well.