D-(+)-Trehalose dihydrate is widely used in the food industry as a stabilizer and preservative due to its ability to protect proteins, lipids, and other sensitive components from damage caused by freezing, drying, or heat. It is commonly added to baked goods, dairy products, and confectionery to enhance texture, shelf life, and flavor retention.

In the pharmaceutical sector, it serves as an excipient in drug formulations, particularly for stabilizing vaccines, antibodies, and other biologics during storage and transport. Its unique properties help maintain the integrity and efficacy of these sensitive compounds.

Additionally, it is utilized in cosmetics and personal care products as a moisturizing agent, helping to retain skin hydration and improve product stability. Its natural origin and compatibility with biological systems make it a preferred choice in various industries.

In scientific research, it is used as a cryoprotectant for cells and proteins in freezing and lyophilization processes.