Portions and satiety: what role does fiber play in appetite control?

Dietary fiber is a key component for maintaining a prolonged feeling of fullness and managing portion sizes. Fiber is found in vegetables, fruits, legumes, and whole grain products. It is not digested by human enzymes, but it performs vital work in the gastrointestinal tract.

Once in the stomach, soluble fiber absorbs water and turns into a gel-like substance that slows down the process of gastric emptying. This causes the mechanical receptors in the stomach wall to send fullness signals to the brain for a longer period, while blood sugar levels rise smoothly, preventing sudden bouts of wolfish appetite.

Including a sufficient amount of plant fiber in every meal provides tangible benefits:

Gradually increasing the proportion of fiber-rich foods allows you to naturally reduce portions without a constant feeling of hunger and struggling with your own appetite.