Dietary fiber is primarily categorized into two main types: soluble fiber and insoluble fiber. These types differ in how they interact with water in the digestive system, influencing their effects on health.
Soluble vs. Insoluble Fiber
Fiber types are commonly classified based on their solubility in water.
- Soluble fiber dissolves in water to form a gel-like substance.
- Insoluble fiber does not dissolve in water and largely passes through the digestive system intact.
The provided reference identifies several specific types of fiber and assigns them to one of these categories:
| Types of Fiber | Soluble or Insoluble |
|---|---|
| Cellulose, some hemicellulose | Insoluble |
| Inulin oligofructose | Soluble |
| Lignin | Insoluble |
| Mucilage, beta-glucans | Soluble |
Characteristics and Sources (Simplified)
Understanding the general characteristics can help identify dietary sources:
- Insoluble Fiber: Often found in the skins of fruits, vegetables, whole grains, and nuts. It adds bulk to stool, helping promote regular bowel movements.
- Soluble Fiber: Typically found in oats, barley, nuts, seeds, beans, lentils, and some fruits and vegetables. It can help moderate blood sugar levels and lower cholesterol.
Different types of fiber, whether soluble or insoluble, contribute uniquely to digestive health and overall well-being.
