Grapes are not bad for people with diabetes, according to the American Diabetes Association. Because fruits contain carbohydrates, diabetics must count them as part of a meal plan.
Because fruits such as grapes contain significant amounts of fiber, vitamins and minerals, they are an ideal snack food for people diabetes, notes the American Diabetes Association. People with diabetes should seek out fruits that are fresh, canned or frozen that do not contain added sugars. The can substitute grapes and other fruits for other foods that contain carbohydrates, such as dairy, grains or starches. Because of their fiber and fructose content, most fruits have a low glycemic index.