Diabetes Superfoods Your list of the top 10 diabetes superfoods has arrived. As with all foods, you need to work the diabetes superfoods into your individualized meal plan in appropriate portions. All of the foods in our list have a low glycemic index or GI and provide key nutrients that are lacking in the typical western diet such as: Calcium Potassium Fiber Magnesium Vitamins A (as carotenoids), C, and E.