Fiber slows digestion and absorption, producing a smaller, slower insulin response to the same carbohydrates. When you eat an apple versus apple juice, the sugar is similar but the metabolic outcome is completely different — fiber creates a physical barrier, delays gastric emptying, and adds bulk without calories. Modern processing systematically removes fiber, stripping away nature’s built-in protection.
This companion explores the mechanism, the apple vs. juice example, fiber’s multiple protective effects, and practical implications for eating carbohydrates with their fiber intact. (4 min read)