How does water-soluble fiber affect digestion?

Water-soluble fiber plays a significant role in digestion by absorbing water and forming a gel-like substance in the digestive tract. This process helps to slow down the movement of food through the stomach and intestines, which can lead to improved nutrient absorption. By forming a gel, water-soluble fiber can also help to stabilize blood sugar levels by slowing glucose absorption after meals.

While the other choices address various aspects of digestion, the unique property of water-soluble fiber to absorb water is its most notable function. This property can also aid in making stool softer, which can help prevent constipation. Therefore, the response accurately reflects the physiological effects of water-soluble fiber on digestion and its interaction with water in the digestive system.