Dehydroascorbic acid (DHA) is an oxidized form of ascorbic acid. Ascorbic acid is transported in its oxidized form via GLUT1 across the blood-brain barrier. Dehydroascorbic acid delay low-density lipoprotein (LDL) oxidation when added before the initiation of the process, they accelerate the process if added to minimally oxidized LDL. Dehydroascorbic acid is used as biochemical markers of oxidative stress in clinical investigations. Dehydroascorbic acid has been used as a vitamin C dietary supplement.