L-Threitol is widely used in the pharmaceutical industry as a chiral building block for synthesizing various drugs, particularly those requiring specific stereochemistry. It serves as a precursor in the production of antiviral and anticancer agents, where its structure plays a critical role in enhancing drug efficacy. In the food industry, it is utilized as a low-calorie sweetener and humectant, helping to retain moisture in products like baked goods and confectionery. Additionally, L-Threitol finds applications in cosmetics, where it acts as a moisturizing agent in skincare formulations, improving skin hydration and texture. Its stability and compatibility with other ingredients make it a valuable component in personal care products.