Chemically, fibers are a diverse group of plant polymers based on polysaccharide chains. In contrast to starch, which is also a type of polysaccharide, fibers cannot be digested by humans, and pass through the gastrointestinal tract fully or partially intact. Large amounts of fiber in the diet make stools soft and bulky. A role of fiber in preventing diseases and obesity was hypothesized, which spawned abundant research on the subject. Some health benefits of fiber, such as colon cancer prevention, are still controversial.
Fiber slows down the rate at which glucose is absorbed from food into the bloodstream.
This gives the body more time to process carbohydrates, leading to lower blood sugar and better carbohydrate metabolism. It is estimated that a typical citizen of a developed country consumes about one third of the amount of fiber optimal for health and longevity. Luckily, it is not as difficult to increase one's fiber intake without supplements as many people think. Keep in mind that fiber supplements, especially when used improperly, may cause intestinal obstruction, a serious health problem. Exercise Regular exercise is known to improve carbohydarate tolerance and have a variety of other health benefits.