When it comes to gut health, dietary fiber gets a five-star rating. Fiber is a type of non-digestible carbohydrate, meaning it is not absorbed by the body, and goes undigested through the gastrointestinal (GI) tract. While on its way, it acts as a bulking agent for the stool, facilitating a smooth transit of food out of the body. There are two types of fiber: soluble fiber and insoluble fiber. Soluble fiber is water-soluble, and therefore softens the stool, while insoluble fiber adds roughage and volume to the stool. Both types are essential for proper digestion. Fun fact: Fiber is only found in plant-based foods.