Time for a little GHK CU update for the people who are interested. It's day 9. I took a little break on day 5 just so my body didn't get too 'used' to 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, GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? 7% GHK Cu Accelerant