Any snack that only contains carbs
When you eat crackers, dry cereal, bread, or rice cakes alone, your body converts the carbs to simple sugars and sends it directly into your blood stream. In response to the sugar rush, your body produces extra insulin, which helps your body absorb the sugar ASAP. The problem: You end up with low blood sugar and the same hunger pangs that led you to carb it up in the first place. You then may be inclined to reach for sugary foods with no nutritional value to satisfy your need for instant energy, says Charlie Seltzer, M.D., a weight-loss specialist based in Philadelphia, Pennsylvania.