Chilling cooked starch turns part of it into resistant starch, which your body treats like fiber instead of carbs. That means fewer digestible carbs and a smaller blood-sugar spike. This works with potatoes, rice, pasta, oats, and beans. Cooling for 12 hours gives the best effect — and the benefit remains even after reheating. More resistant starch also helps gut health, keeps you fuller longer, and supports steadier energy. Some foods are really good at this: • White potatoes (biggest change) •