What is the difference between soluble and insoluble fiber?

The distinction between soluble and insoluble fiber lies in their unique properties and health benefits. Soluble fiber, found in foods such as oats, beans, and some fruits, dissolves in water to form a gel-like substance. This characteristic is what enables soluble fiber to help lower cholesterol levels by binding with cholesterol particles in the digestive system and facilitating their excretion.

On the other hand, insoluble fiber, which is primarily found in whole grains, nuts, and the skins of fruits and vegetables, does not dissolve in water. Instead, it adds bulk to the stool and helps move waste through the digestive tract. This action aids in preventing constipation and promotes regularity, making it an essential part of digestive health.

This understanding of the functions of soluble and insoluble fiber highlights the importance of both types in a balanced diet. Soluble fiber's role in cholesterol management and insoluble fiber's function in digestion emphasize their differing contributions to overall health, making option B the correct answer.