The Physiological Role of Dietary Fiber
1. Increase satiety and reduce the absorption of other nutrients. Dietary fiber (DF) enters the digestive tract, absorbs water and expands in the stomach, increases gastric motility, delays the speed of stomach contents entering the small intestine, and reduces the small intestine's absorption of nutrients speed. At the same time, it makes people feel full, which is beneficial to reducing food intake for patients with diabetes and obesity.
The DF that enters the small intestine from the stomach can hardly be broken down by digestive enzymes and continues to move to the lower intestine. In the meantime, DF has a certain effect on the hydration of intestinal contents, the emulsification of lipids, and the digestion of digestive enzymes. It also hinders the digestion of food masses and the absorption of nutrients, which can form high viscosity. Sol and gel water soluble dietary fiber has a stronger effect.
DF, which has the ability to bind to cations, can hinder the absorption of inorganic salts in the intestinal tract, while alginic acid (a soluble DF) with ion exchange capacity can adsorb sodium salts and be excreted with feces, thereby reducing blood pressure.
2. Lower blood cholesterol, prevent gallstones, hyperlipidemia, and cardiovascular disease. DF can hinder the absorption of neutral fat and cholesterol and has a preventive effect on dietary hyperlipidemia. DF can reduce the reabsorption of bile acids, which can change the speed of food digestion and the secretion of secretions in the digestive tract, play a role in preventing gallstones, preventing hyperlipidemia, and cardiovascular diseases.
3. Prevention of diabetes. The viscosity of soluble DF, for example, maltitol powder, can delay the absorption of glucose, inhibit the rise of blood sugar, and improve glucose tolerance.
DF can also increase the sensitivity of tissue cells to insulin and reduce the need for insulin, thus having a certain effect on diabetes prevention.
4. Change the intestinal flora. DF entering the large intestine can be partially and selectively decomposed and fermented by intestinal bacteria, thereby changing the composition and metabolism of the intestinal microflora and inducing the proliferation of beneficial flora.
- Fructo Oligosaccharide
- Malt Oligosaccharide