s-acetyl glutathione uses S-Acetyl-Glutathione | Xymogen Glutathione - The Master Antioxidant
Description
L-ascorbic acid (vitamin C) oxidizes the copper(II) ion in GHK-Cu, neutralizing both actives

The key is choosing a copper peptide formulation with proven bioactive ingredients and applying it after scalp stimulation to maximise absorption

Hyspler R, Ticha A, Schierbeek H, Galkin A, & Zadak Z

Sachdeva S, Khan Z, Ansari MA, Khalique N, Anees A

Nature 288, 715717 (1980)

It is not approved for therapeutic use and remains for investigational and laboratory applications
