Simple carbs are the white stuff – white bread, most pastries, refined sugars (like in soda). What makes it so simple? These foods provide energy, but lack the same nutrients (vitamins, minerals, and fiber) as complex carbohydrates. The body also breaks simple carbs down quickly, spikes blood sugar (insulin), and leaves your tummy might rumbling sooner than you imagined. Choose whole grains instead, which may reduce potentially dangerous excess abdominal fat buildup (which can lead to diabetes). Switch to whole-wheat pasta or whole grain bread, or try grains like brown rice, quinoa, or millet.