(L)-Dehydroascorbic acid is primarily used in biological and medical research due to its role in cellular redox reactions. It serves as an oxidized form of vitamin C, making it valuable in studies related to oxidative stress and antioxidant mechanisms. In cell culture applications, it is utilized to investigate cellular uptake and transport processes, particularly in understanding how cells manage oxidative environments. Additionally, it is employed in the development of pharmaceutical formulations aimed at enhancing the stability and bioavailability of vitamin C-based products. Its involvement in collagen synthesis and immune function studies further highlights its significance in biomedical research.