“Does anyone have any thoughts about just using glutathione?”
easily available via NAC precursor, but pure oral glutathione will be digested in the gut ...
“but pure oral glutathione will be digested in the gut”
True. This has been known since the ‘30s.
Dr Harry Demopoulos patented a formulation that strategically added a sulfur molecule which enabled glutathione to be successfully absorbed. You can still get that formulation from the brand name Setria.