Just a few drops are enough to prepare the face for further nourishment or sun protection

Lyophilized GHK-Cu shelf life (before reconstitution) Freezer storage (-20C): 12-24 months Most common storage Standard home freezer adequate Expected shelf life: 18-24 months typical GHK-Cu slightly shorter than some peptides (copper oxidation) Still excellent storage option Why GHK-Cu shelf life shorter than some peptides: Contains copper (oxidation concern) Copper can catalyze degradation More sensitive than copper-free peptides But still stable for 1-2 years frozen Refrigerator storage (2-8C): 6-12 months Acceptable if using soon Shorter than freezer 6 months very safe 12 months likely fine but degradation starting Room temperature: Weeks to 2-3 months Not recommended for storage Only during shipping or brief periods Copper oxidation accelerates Use freezer or fridge GHK-Cu vs other peptides shelf life: Maximizing lyophilized GHK-Cu shelf life: Freeze immediately upon receipt Keep in sealed vial (moisture is enemy) Store in box (protect from light) Minimize freeze-thaw cycles Label with date received See our peptide storage guide , do peptides expire , and should copper peptides be refrigerated

This makes it particularly valuable for cognitive performance and focus
In order to be taken up by the liver it has to be degraded to amino acids. [I also wonder- since glutamate is elevated in metabolic disease, and a residue in the GSH tripeptide, might it be that providing glycine or serine to support synthesis could be preferred over glutathione
How Does Glutathione With Vitamin C Whiten Skin
Vitamin C helps regenerate glutathione, keeping it active in the body, while selenium is essential for the production of glutathione peroxidase, an enzyme that enhances its antioxidant effects