Ghk Cu Allergic Reaction If your GHK injection site gets irritated try this , 1. Dilute it by adding more water to the syringe , 2. Let it sit until it reaches room temperature , Also, make sure youre rotating injection Understanding Peptides: BPC 157, GHK Cu & Beyond Meeting Point Health Perhaps the most commonly asked about question when it comes to GHK Cu is THE BURN. Let's learn! @summitrejuvenation GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend