glutathione and ghk cu My Peptide Journey: Retatrutide & More My Internal Skin Stack: Glutathione,
Description
Youll see it referenced both ways in the literature, and some vendors label it as 177-191 for this reason
At the same time, GHK acts as a messenger

[10] Transient changes in structural plasticity [edit] Applying a low-frequency train of two-photon glutamate uncaging in a single dendritic spine can elicit rapid activation of both RhoA and Cdc42
GHK-Cu (Copper Peptide) is not FDA-approved for anti-aging, cosmetic, hair growth, or wellness purposes

Am J Clin Pathol (2004) 121:4828

The claim makes biological sense
