The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, Amazon.com: QUBIT GHK Cu Copper Peptide Supplement for Skin & Hair, Easy to Absorb, Precisely Dosed 90 Vegan Capsules : Health & Household Copper Peptides Elmhurst IL Chicago Accelerated Aesthetics What is the optimal dosing regimen of GHKCu for topical skincare and woundhealing applications?