It is stable in in the harsh acidic environment of the stomach and has no reported toxicity
Glutathione has many different functions in the body including breaking down free radicals, assisting enzymes to function, regenerating vitamins C and E, forming sperm, and also supporting the immune system
Glutathione is made up of molecules that work to protect the mitochondria from any external damage such as that caused by free radicals
The biological roles proposed for GHK-Cu in the research literature have included effects on collagen and extracellular matrix synthesis (through copper-dependent enzymes including lysyl oxidase), on antioxidant gene networks (where copper participates in both prooxidant and antioxidant chemistry depending on context), on growth factor activity in tissue repair, on hair follicle biology, and on broader transcriptional programs characterized in microarray and RNA-seq studies
That gap is why veterinarians sometimes fold antioxidant support into a broader plan, and research in canine liver disease has found altered glutathione levels in liver tissue
Intermittent cycling: Take glutathione for a few months, followed by a break, to encourage the bodys natural production