Insulin acts like a switch: high means store fat, low means release it. Research by Ludwig on the carbohydrate-insulin model shows chronically elevated insulin keeps fat cells in perpetual storage mode. When you eat, insulin signals fat cells to take up fatty acids and blocks their release. During fasting, the brake lifts.
This companion covers insulin’s dual role, the fasting state, why meal timing matters, and practical applications including creating insulin gaps. (3 min read)