Resistant Dextrin, also known as resistant maltodextrin, is a low-calorie, water-soluble dietary fiber derived from starch, typically corn or wheat starch. It appears as a white to pale yellow powder, has a slightly sweet taste, and dissolves readily in water, forming a low-viscosity, stable solution that is transparent or faintly yellow. Its pH ranges from 4.0 to 6.0. This ingredient possesses excellent processing stability, being resistant to heat, acid, and freezing conditions. 

Resistant dextrin is a low-molecular-weight glucan produced through controlled hydrolysis and repolymerization of starch. This process creates complex branched structures containing glycosidic bonds (including α-1,2 and α-1,3 linkages) that human digestive enzymes cannot break down, making it indigestible. Consequently, its fiber content is high (≥82%), while its sugar content is minimal (mono- and disaccharides ≤0.5%).

Key functional benefits of resistant dextrin include:

*   Low Calorie and Weight Management: It provides minimal calories, increases satiety, delays hunger, and has been shown to help reduce body weight gain, visceral fat area, and triglyceride levels in studies. It has a high tolerance dose with minimal gastrointestinal discomfort. 

*   Blood Glucose Regulation: It can adsorb glucose and inhibit amylase activity, thereby slowing starch degradation and glucose absorption, which helps suppress post-meal blood sugar spikes, making it suitable for diabetic dietary considerations. 

*   Prebiotic Effects and Gut Health: Recognized as a prebiotic in China, it ferments in the colon to produce short-chain fatty acids. This process promotes the growth of beneficial bacteria (e.g., lactobacilli, bifidobacteria), inhibits pathogenic bacteria, and supports intestinal barrier function. It also aids nutrient absorption, including calcium, iron, and zinc. 

*   Cardiovascular Health: Consistent intake has been demonstrated in animal and human studies to help lower serum cholesterol and neutral fat concentrations, supporting lipid metabolism. 

In the food industry, resistant dextrin is widely used due to its neutral flavor and functional properties:

*   Dairy Products: It can simply replace sugar or part of the fat in low-calorie ice cream, low-fat yogurts, and fiber-fortified milk beverages without altering flavor, while synergistically enhancing the activity of probiotics. 

*   Bakery and Staple Foods: Added at 3-6% of flour weight, it can improve dough strength, enhance bread color, and provide a special aroma in steamed buns. In biscuits and pastries, it helps maintain softness, moisture, and extends shelf life. 

*   Meat Products: It acts as an excellent fat replacer, improving yield, texture, and flavor retention, enabling the production of high-protein, high-fiber, low-fat functional meat products like sausages. 

*   Infant Foods: It can improve nutrient utilization and promote the absorption of trace minerals. 

It also finds applications in health foods, pharmaceuticals, and other industrial sectors. 

Specification of Resistant Dextrin Resistant Maltodextrin