From starch to dietary fiber, resistant dextrin has become a new favorite in the food industry!
2026-01-13
Resistant dextrin is essentially a water-soluble dietary fiber. Dextrin is the decomposition product of starch under the action of heat, acid or enzymes. It is more viscous and soluble than starch; and the term "resistant" means resistant to digestion, that is, it cannot be decomposed and absorbed by the digestive enzymes in the human small intestine.
From a chemical structure perspective, it is a low-calorie glucan derived from starch processing. The key to its anti-digestibility lies in the special molecular connection method. During the processing, in addition to the conventional α-1,4 glycosidic bonds, a large number of glycosidic bonds that human digestive enzymes cannot break, such as α-1,2, α-1,3 and β-1,6 bonds, are also formed. These unique bond structures form a complex branched structure, allowing it to smoothly pass through the small intestine and reach the large intestine to become food for intestinal microorganisms.
The preparation process of resistant dextrin mainly adopts the acid-heat method, which involves conducting a dextrinization reaction on starch under high temperature and acidic conditions. This is currently the mainstream industrial method. Taking common cassava resistant dextrin as an example, its production involves heating cassava starch under a weakly acidic condition and through the caramelization dextrinization process, converting the starch into a glucose chain mixture that can resist digestion.
In China, in 2012, the Ministry of Health classified resistant dextrin as a common food item. This policy has significantly promoted the application of resistant dextrin in various types of food within the country.
2.The core characteristics and health benefits of resistant dextrin
01.Outstanding processing characteristics
As a food raw material, resistant dextrin performs exceptionally well. It is highly soluble in water and the solution viscosity after dissolution is very low, hardly affecting the taste and texture of the beverage. At the same time, it possesses stability against heat, acid and freezing, and can adapt to various demanding food processing environments such as beverage sterilization, yogurt fermentation, and high-temperature baking. Its sweetness is only about one-tenth of that of sugar, and it has extremely low calories. The total dietary fiber content can reach over 82%.
02. Regulate intestinal health
As a soluble dietary fiber, the core function of resistant dextrin begins in the intestines. It is not absorbed by the small intestine and, after entering the large intestine, can be selectively fermented by the beneficial bacteria in the intestinal tract (such as bifidobacteria), playing the role of a prebiotic and promoting the proliferation of beneficial bacteria. This fermentation process produces short-chain fatty acids mainly composed of butyric acid, which provides energy for intestinal cells and helps maintain a normal intestinal environment and immune function.
Compared with other prebiotics (such as inulin), resistant dextrin has a slower fermentation rate and is located deeper in the colon. Therefore, it usually has better tolerance and causes less bloating and flatulence in the stomach and intestines. In addition, its high water-holding capacity can increase the volume of feces, soften the feces, promote intestinal peristalsis, and have a good effect on preventing and relieving constipation.
03. Regulating blood sugar and blood lipids
Regarding the metabolic health that is of great concern to modern people, resistant dextrin shows clear benefits. Research has confirmed that consuming resistant dextrin can slow down the rate and peak of post-meal blood sugar increase, and reduce insulin response. For instance, when using resistant dextrin syrup to partially replace the sugar in concentrated fruit juice, the resulting blood sugar reaction is only equivalent to 10% of the original sugar. The mechanism lies in the gel-like substance formed by it, which can delay the absorption of sugar in the intestines and may affect the secretion of digestive hormones.
In terms of lipid regulation, resistant dextrin can bind to bile acids, cholesterol and other substances in the intestinal tract, reducing their reabsorption. This helps to lower the total cholesterol and triglyceride levels in the blood.
04. Assist in weight management
Resistant dextrin supports weight management through multiple mechanisms. Firstly, it absorbs water and swells in the digestive tract, which can increase satiety and help reduce subsequent food intake. Secondly, it indirectly reduces fat synthesis and accumulation by improving sugar and lipid metabolism. Some clinical studies have shown that daily supplementation of resistant dextrin (especially before meals) helps optimize metabolic indicators. For example, a study on obese women with type 2 diabetes showed that taking 10 grams of resistant dextrin daily for 8 weeks improved the subjects' blood sugar control, cortisol levels (a stress hormone), and inflammatory indicators, as well as enhancing sleep and quality of life.
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