How does soluble fiber differ from insoluble fiber?

Soluble fiber is known for its ability to absorb water and form a gel-like substance in the digestive tract. This characteristic not only helps in controlling blood sugar levels but also plays a significant role in lowering blood cholesterol levels. When soluble fiber binds with bile acids in the intestines, it aids in their excretion, which in turn prompts the body to use cholesterol to replace the bile acids, effectively reducing overall cholesterol levels.

In contrast, insoluble fiber does not absorb water but instead adds bulk to the stool, facilitating bowel movements and preventing constipation. It plays a different role in digestive health, primarily aiding in the movement of food through the gastrointestinal tract. Thus, soluble fiber's unique ability to absorb water and its impact on cholesterol levels are what distinctly differentiate it from insoluble fiber.