Carbs are those foods that most affect our glycemic index (GI). Your GI relates to how much blood sugar is increased by the foods you eat. If your daily GI is too high, you may be a candidate for type-2 diabetes.
So any added sugar—refined or high fructose corn syrup, refined grains like cold cereal and instant oatmeal, boiled potatoes, most melons are not the best carbs. Most healthy diets recommend you stay away from these carbs. The very good carbs are beans, non-starchy vegetables, raw fruit, nuts and dairy products. The medium good carbs are unprocessed grain—like whole wheat and brown rice, honey, sweet potatoes, ripe bananas, mangos and papaya. There are lots of choices, so eat healthy!
~Scientific American Health after 50