Used as a primary energy source in biological systems, providing fuel for cellular respiration in living organisms. Widely applied in medical settings through intravenous solutions to maintain blood glucose levels in patients unable to eat. Serves as a fermentation substrate in the production of ethanol, organic acids, and antibiotics in industrial biotechnology. Employed in the food industry as a sweetener and texturizing agent in baked goods, beverages, and processed foods. Utilized in research for cell culture media to support the growth of mammalian cells. Also functions as a building block for synthesizing other important carbohydrates like glycogen, starch, and cellulose.