#complex carbohydrate
- Starch — A macromolecular natural structural polysaccharide, with the general chemical formula (C6H10O5)n, composed of alpha-glucose units linked in linear chains (amylose) and branched chains (amylopectin). It represents the primary energy reserve substance in plants, accumulated in seeds, tubers, and fruits, serving as a fundamental element in human nutrition and a major raw material used in the food, textile, pharmaceutical, and paper industries.