Insulin sensitivity means your cells respond efficiently to insulin—a small amount effectively moves glucose into cells. Insulin resistance means more and more insulin is required to do the same job. You want sensitivity. Research by Sutton showed that early time-restricted feeding improves insulin sensitivity. Resistance promotes fat storage, blocks fat burning, and drives chronic hunger—a step toward type 2 diabetes.
This companion covers what insulin does, the ideal of sensitivity, the problems of resistance, how resistance develops (chronic insulin exposure, excess fat, inactivity), and how to improve sensitivity through fasting, exercise, and dietary changes. (4 min read)