Insulin resistance is your cells slowly going deaf to insulin. It is the root of much metabolic disease, and it develops for years while standard glucose still looks normal. Fasting insulin catches it early, when it is most reversible.
- Glucose can look fine while insulin is quietly climbing to keep it there.
- Signs: belly fat, energy crashes after carbs, cravings, creeping weight.
- Muscle is your biggest glucose sink, resistance training is protective.
- Caught early, it is often reversible with training, sleep, and food quality.