Which of the following carbohydrates can be classified as soluble fiber?

Pectin is considered a soluble fiber because it dissolves in water to form a gel-like substance in the digestive tract. This property of pectin is beneficial as it can help slow digestion and absorption of sugars, leading to improved blood sugar control and cholesterol management. Soluble fibers like pectin also contribute to feelings of fullness and can have a positive effect on gut health by promoting the growth of beneficial bacteria.

Other carbohydrates listed, such as glycogen and starch, are classified as storage carbohydrates. Glycogen is the storage form of glucose in animals, and starch is a storage form of glucose in plants; both are mainly composed of insoluble fibers. Cellulose, found in plant cell walls, is an insoluble fiber that does not dissolve in water and is more structural in nature, contributing to the bulk of stool rather than forming gels in the digestive system. This highlights pectin's unique role among the options provided as a soluble fiber with specific health benefits.