Hour 4
Blood Glucose Falling
The first real signal: your body is burning through the last of that meal.
What's Happening
Insulin levels are dropping as the meal is processed. Blood glucose begins its descent from the post-meal peak. Your liver starts releasing stored glycogen to maintain blood sugar levels.
How You're Feeling
Hunger may appear — a light signal, not a crisis. If you ate a heavy carb meal before starting, you might feel a mild crash as the sugar spike resolves.