Dangerous' tanning products promoted by influencers BBC News My Sunday facial before and after..After 18 KLOW injections. I can't get enough of the science behind this!! The peptides I use test at 99% purity. That is as high as a GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Peptide Therapy for Pain Management and Healing Core Medical & Wellness