And we're back with our GHK Cu peptide injection pen. Here's how to use it, and where. More coming soon ;) #ghkcu #ghkcucopperpeptide #peptides GHK CU, Why this audio? Because injecting feels like a constant wasp sting so it takes me about 15 seconds to pin .2 mL. I dread this shot every night for that reason. Also, it leaves me bruised, so I GHK Cu Copper Peptide Collagen, Skin Rejuvenation & Hair Restoration Injectable GHK Cu: Beginner's Guide to Copper Peptide