Carbohydrates are important for your body, but eating too many of them in your diet can cause your blood sugar to have more drastic highs and lows. In addition, you’ll find that more fat collects along your midriff and hips. By being selective in the types of carbs you ingest, you will still get what you need in your diet but without those blood sugar swings.Just say no to processed foods. Basically white foods - anything with white flour and sugars - are converted more quickly to glucose in your body. This causes a spike in your blood sugar levels that lasts just a short time. Before you know it, your energy plummets and you feel lethargic because that “sugar rush” is gone. Then, in order to get that energy level back up, you eat more carbs and the cycle starts all over again.