What is the difference between soluble and insoluble fiber?

The distinction between soluble and insoluble fiber is essential for understanding their roles in health and nutrition. Soluble fiber is characterized by its ability to dissolve in water, forming a gel-like substance that can help slow digestion. This property is particularly beneficial as it aids in lowering cholesterol levels and stabilizing blood sugar by slowing glucose absorption. Foods rich in soluble fiber include oats, beans, lentils, apples, and citrus fruits.

On the other hand, insoluble fiber does not dissolve in water, maintaining its structure and adding bulk to the digestive tract. This type of fiber plays a crucial role in aiding digestion by promoting regular bowel movements and preventing constipation. It's primarily found in whole grains, wheat bran, nuts, and vegetables.

Thus, the correct answer emphasizes that soluble fiber aids in lowering cholesterol while dissolving in water, and that insoluble fiber is instrumental in digestion and preventing constipation. This clear distinction illustrates the different roles that these two types of fiber play in maintaining overall health.