glutathione is synthesized from Glutathione: an overview of biosynthesis and modulation Glutathione (GSH): Synthesis, Functions, and
Description
If you have GI issues: S-acetyl glutathione or sublingual delivery may be preferable, as both reduce reliance on intact GI tract absorption

Factors Affecting Post-Reconstitution Shelf Life 1

Food Chemistry, 310 , 125967

Annals of Internal Medicine, 89(5), 632-634
Specifically, whether ROS-driven mitochondrial dysfunction directly contributes to mtDNA upregulation and subsequent promoting disease progression requires systematic investigation