glutathione protects cancer cells Role of GSH in carcinogenesis . has been shown to regulate Full article: Nanozyme-mediated glutathione depletion
Description
They might be taking a high dose on paper, but only a small fraction is surviving the "first-pass metabolism" in the liver and digestive system

In September 2023 GHK-Cu, also known as copper peptide or glycyl-l-histidyl-l-lysine copper complex, was added to the 503A bulks list in category 1

We evaluated their clinical parameters before and after glutathione treatment

Here, the glutathione is contained within a casing made from phospholipids, liposomes, which protect it from digestive secretions and ensure it completes its journey to the intestinal barrier in its reduced form (9)
