Video narration
The moment sugar enters your body, a hidden chemical reaction begins. Your sweet bite reaches the stomach, then the small intestine. There, digestible carbohydrates break down, and glucose enters your bloodstream. As blood sugar rises, your pancreas responds by releasing insulin-the messenger that tells suitable cells to take glucose in for energy. That is the control step: insulin does not make sugar vanish. It directs glucose out of the bloodstream. Any extra can be stored as glycogen, mainly in your liver and muscles, for later use. If you repeatedly consume more sugar or energy than your body needs, blood glucose and insulin demands can stay high, contributing over time to insulin resistance-when cells respond less effectively. Repeated excess-not one isolated meal-is the concern. Sugar is fuel-but your body has a system for controlling how much fuel stays in your bloodstream.