脱氢抗坏血酸（Dehydroascorbic acid, DHA）是氧化形式的抗坏血酸（维生素C）。

运输至线粒体

维生素C以DHA的形式通过葡萄糖转运体（GLUT1）进入在有大量自由基产生的线粒体中并聚集。

Dehydroascorbic acid (DHA) is an oxidized form of ascorbic acid (vitamin C). It is actively imported into the endoplasmic reticulum of cells via glucose transporters. It is trapped therein by reduction back to ascorbate by glutathione and other thiols. The (free) chemical radical semidehydroascorbic acid (SDA) also belongs to the group of oxidized ascorbic acids.