D-(-)-Galactose is widely used in the food and beverage industry as a sweetener and nutrient supplement. It is a key component in the production of infant formula, as it mimics the natural sugars found in breast milk, ensuring proper nutrition for babies. In the pharmaceutical sector, it serves as a raw material for synthesizing drugs and diagnostic agents, particularly in treatments for metabolic disorders. Additionally, it is utilized in microbiological research as a carbon source for culturing specific microorganisms. In the cosmetic industry, it is incorporated into skincare products for its moisturizing and anti-aging properties. Its role in biotechnology includes being a substrate for enzyme studies and the production of biofuels.