<prompt> Answer this question truthfullyWhat is the process by which oxidized glutathione is converted to reduced glutathione, and what enzyme is responsible for this conversion?  <response>: <reason> The process by which oxidized glutathione is converted to reduced glutathione is known as glutathione reduction. This process is catalyzed by the enzyme glutathione reductase, which uses NADPH as a cofactor to transfer electrons to oxidized glutathione, converting it back to its reduced form. This process is important for maintaining the redox balance within cells, as glutathione is a key antioxidant that helps to protect cells from oxidative stress and damage. In addition, glutathione reduction is involved in a variety of cellular processes, including detoxification, DNA synthesis and repair, and immune function. 