glutathione and sertraline Repurposing the Antidepressant Sertraline: A Systematic Scoping Review of Its Anticancer Mechanisms Reduced L-Glutathione Plus™ (50 Caps)

The economics haven't pushed it there, because the cheap-and-plentiful oral route is good enough for the outcomes NAC is asked to deliver

If you want to compare formulation approaches, the article Is Liposomal Glutathione Absorbed

The peptide is typically administered via subcutaneous injection, and therapy may consist of two short courses per year, following either the 100mg Russian Protocol or the 50mg Ukrainian Protocol

Tationil Injection Glutathione Injection 600mg Benefits: Skin Lightening and Brightening: Tationil helps to lighten the skin by inhibiting melanin synthesis, leading to a reduction in hyperpigmentation, dark spots, and uneven skin tone