White rice, bread, and flour
Big offenders on the low-quality carb list are refined starches, like white rice and anything made with white flour, including white bread and pasta. These “white” carbs act a lot like sugar once your body begins to digest them, which means they will increase your glucose levels.
Replace white carbs with whole grains, such as brown or wild rice, barley, oatmeal, high-fiber cereals, and whole-grain breads, for carbs that break down more slowly and have a less dramatic effect on blood sugar.
