Corn is a starchy vegetable high in protein and vitamin ... but when it comes to carbohydrates, it tops the charts. A 1-cup serving of mango has 28 grams of carbs and only 3 grams of fiber.

The researchers applied the metric to more than 2,500 different carb-rich products. The CFQS system placed a large proportion of beans, vegetables and fruits — all foods high in potassium and ...