Fiber plays a crucial role in maintaining stable blood sugar levels by slowing down the digestion and absorption of carbohydrates. Soluble fiber, in particular, can help regulate blood glucose by forming a gel-like substance in the digestive tract, which delays carbohydrate absorption. This property aids in preventing spikes in blood sugar post-meal, thereby reducing the risk of insulin resistance and related metabolic issues. A diet high in fiber contributes to overall health and can be especially beneficial for individuals with diabetes.