ANSWER

Vitamin C induced oxidation of glutathione (GSH) to its oxidized form (GSSG). Glutathione, an antioxidant, helps protect cells from reactive oxygen species such as free radicals and peroxides. Vitamin C dramatically increased intracellular GSH oxidation and reactive oxygen species (ROS) levels.

Enclosed please find the studies/journals that relates vitamin C and glutathione production.

Antioxidants-Status-and-Serum-Total-Protein-Levels-in-Elderly-Women

Glutathione-stabilizes-ascorbic-acid-in-aqueous-solution

The-Effect-of-Vitamin-C-and-Glutathione-on-Cytotoxicity-and-Selected-Parameters

The-Effects-of-High-Concentrations-of-Vitamin-C-on-Cancer-cells

Vitamin-C-is-an-essential-antioxidant-that-enhances-survival-of-oxidatively-stressed-human-vascular-endothelial-cells

Vitamin-C-Uric-acid-and-Glutathione-Gradients-in-Murine-Stratum-Corneum-and-their-susceptibility-to-Ozone-Exposure