Dietary starch and digestible polysaccharide

Dietary starches and other digestible polysaccharides are complex carbohydrates that serve as the primary source of glucose and energy in the human diet [1]. They consist of long chains of glucose units linked by glycosidic bonds, primarily amylose and amylopectin in plants, and glycogen in animal tissues [2]. In the digestive tract, these molecules are broken down into monosaccharides by enzymes such as salivary and pancreatic alpha-amylase and brush-border alpha-glucosidases [2]. While not therapeutic targets themselves, the rate and extent of their digestion are critical in managing metabolic disorders like Type 2 diabetes and obesity [3]. Drugs such as alpha-glucosidase inhibitors (e.g., acarbose) work by competitively inhibiting the enzymes that hydrolyze these polysaccharides, thereby slowing glucose absorption and reducing postprandial hyperglycemia [3][4]. Excessive intake or rapid digestion of these carbohydrates is linked to insulin resistance and weight gain [1].

Other names

Complex carbohydratesStarchAmyloseAmylopectinGlycogenDigestible carbohydrates

Competitive inhibition of alpha-amylase and alpha-glucosidase enzymes to delay the hydrolysis of dietary polysaccharides into absorbable monosaccharides [3].