Dextrose, also known as D-glucose, is a simple monosaccharide and the most abundant aldohexose. It serves as a primary source of energy in living organisms and is a key component in carbohydrate metabolism. In food science, it is used as a sweetener, preservative, and bulking agent. Chemically, it exists in open-chain and cyclic forms, with the cyclic form predominant in solution. It is highly soluble in water and plays crucial roles in glycolysis and other metabolic pathways. Industrially, it is produced from starch hydrolysis and used in pharmaceuticals, baking, and brewing. Glucose is the main product of photosynthesis and the human body's preferred energy substrate.