Cranberries are another food that people often associate with holiday meals. And raw cranberries can be enjoyed by diabetics without worrying too much about affecting blood sugar. Where you need to be careful however, is when eating cranberries in the form of cranberry jelly or sauce. These often contain very high amounts of sugar, and because cranberries don’t have much fiber or protein, this sugar will be absorbed into the blood quickly. So enjoy your cranberries, just make sure you read the label first.