Dietary fiber is an important part of a healthy diet, New research shows that, In addition to helping digestion, It can also reduce blood lipid level. Dietary fiber is divided into two types: Soluble and insoluble. Soluble dietary fiber is divided into sticky and non-sticky. After sticky dietary fiber enters digestive tract, It absorbs water from the digestive tract, Becomes viscous colloid. This property allows it to bind cholesterol in the small intestine. Let cholesterol be directly removed from the intestinal tract, Not absorbed into the blood, So as to reduce the content of cholesterol in the blood. Insoluble dietary fiber does not have this characteristic. The most typical is methylcellulose. It is formed by methylation of cellulose, It is also common in some dietary fiber supplements. Some studies have confirmed that Intake of 5 grams of methylcellulose per day can reduce the level of low density lipoprotein (LDL) by about 8%. At the same time, it does not affect the levels of triglyceride and high density lipoprotein. The following two kinds of cellulose, Although it can help digestion and defecation, there is no research to prove that these dietary fibers can reduce blood lipid. Polycarbafil is a viscous and soluble dietary fiber, but no effect of reducing blood lipid has been found in the study. Maltodextrin, It is a soluble, non-sticky dietary fiber, It does not form colloidal form in the small intestine, Therefore, the absorption of cholesterol cannot be interfered with. In fact, the most important way to supplement dietary fiber is to improve the diet structure, rather than relying on supplements. Improving the diet structure can not only increase the intake of dietary fiber, but also increase the intake of other vitamins and minerals, which can provide more benefits than relying solely on supplements.