Topical or SubQ GHK Cu? Same molecule. Very different purposes. Topical you apply it on your skin. Think of it as feeding your skin from the outside. In a 12 week study of GHK Cu Scalp Solution Empower Pharmacy Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum Helloskin GHK Cu 1% Triple Peptide Regenerative Serum Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum eBay This is what the combination of microneedling, peptides and consistency can do These photos are results from scalp restoration using GHK CU from @neuroganhealth How does this treatment work? Microneedling is used