Dietary fiber refers to the parts of plant-based foods that are not fully digested by the human body. It is commonly found in fruits, vegetables, grains, legumes, nuts, and seeds. Fiber plays a role in supporting regular digestive function and contributes to the structure of a balanced eating pattern.
There are two main types of dietary fiber: soluble and insoluble. Soluble fiber dissolves in water and forms a gel-like consistency in the digestive tract. It is found in foods such as oats, beans, and certain fruits. Insoluble fiber does not dissolve in water and helps add bulk to meals, commonly found in whole grains and vegetables.
Fiber-rich foods are often included in daily meals in multiple forms. Breakfast cereals, whole grain bread, fruit bowls, and vegetable-based dishes are common sources. Legumes like lentils and chickpeas also provide significant fiber content.
Cooking methods can influence fiber structure but generally do not eliminate it. For example, steaming vegetables helps retain fiber content while making them easier to consume. Whole food consumption is often encouraged over refined versions to maintain natural fiber levels.