Sweet corn is good for diabetics?

Watch quantity. For someone with diabetes, corn counts as a grain, or carb, rather than as a vegetable. Fresh corn, in particular, contains many valuable vitamins and can be part of a healthy diet. However, because it is a grain, it must be counted against your carb allowance for that meal. 1 medium ear has 26 gm of carbs; 1/2 cup cut corn has 21 gm carbs.