Why do soluble fibers tend to blunt postprandial blood glucose spikes compared with low-fiber foods?

• A. Because soluble fibers neutralize carbohydrates chemically in the mouth, preventing their digestion and absorption in the intestine.
• B. Because soluble fibers create a viscous gel in the small intestine that slows the rate of nutrient diffusion and absorption, reducing the speed at which glucose enters the bloodstream.
• C. Because soluble fibers are converted into insulin by gut bacteria, which then lowers blood glucose rapidly after meals.
• D. Because soluble fibers are absorbed in the stomach and directly carry glucose out of circulation before it can raise blood sugar.

Answer: (B)