liposomal glutathione bioavailability human outperforms plain glutathione in uptake, cell regeneration and systemic availability: evidence from cellular and models | British Journal of Nutrition Glutathione – Renue By Science
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This is the single biggest practical difference between penta deca peptide arginate and traditional BPC-157 acetate

these concentrations are 10 to 100 times higher than the concentrations of Cys in mammalian cells [29]

Simonetti O, Cirioni O, Goteri G, Lucarini G, Kamysz E, Kamysz W

In agreement with this positive connection between glutaminolysis and mTORC1, FOXO-mediated expression of GS inhibits mTOR signaling by blocking its lysosomal translocation [76]

The evidence is promising, but the research base is still building
