glutathione cas number L-Glutathione oxidized, 98%, Certified® 2.5g Cell permeable L-Glutathione (GSSG) | CAS 27025-41-8

This receptor upregulation effect is particularly significant: by increasing GH receptor density, the peptide sensitizes local tissue to systemic growth signals without altering circulating hormone levels

But if you just want the fast answer, most research shows GHK-Cu to be the more broadly studied copper peptide for both hair and skin

Cytosolic GSH can be enzymatically degraded into the cell [20,21], so that Glu, Cys, and Gly can be reused for the synthesis of new GSH (Figure 2B) [21]

( To reduce the uncertainty due to methodological differences in the GABA measurement, as well as to correct for changes in neuronal volume, we also calculated the GABA/Glx ratio