Hepatic glutathione synthesis drops because cysteine availability becomes limited when protein intake falls below 1.2g/kg body weight
Lets look at what the research actually says
When reviewing the literature, you will find that half-life shapes how often a peptide was administered in a given study design
New horizons in treating disorders of hyperpigmentation in skin of color Semin Cutan Med Surg
The evidence points towards the parenteral glutathione as a possible therapy, but no data has come to light related to oral use
Comprehensive biological characterization demonstrated multifunctional therapeutic benefits beyond cytotoxicity, including potent anti-inflammatory activity (significant suppression of TNF-, IL-6, and IL-1), enhanced cellular uptake in MCF-7 cells, and pharmacokinetic advantages manifested as prolonged drug half-life with diminished systemic exposure compared to conventional free doxorubicin