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 #creatorsearchinsights ghk cu peptide before and after Copper Peptide serum Copper Peptide peptide serum GHKGHKCUHKCU Peptide GHKC you Copper Peptide anti aging deep wrinkle treatment Copper peptides GHK Cu Peptide (50mg) Advanced Skin Rejuvenation & Healing Support Wellness peptide craze: why people are injecting drugs 'not for human consumption' Amazon.com: Lovely Southern GHK Cu Peptide Serum 1.5% Copper Peptides Anti Aging Facial Serum for Fine Lines, Skin Elasticity, Made in USA, 1 Fl Oz : Beauty & Personal Care Subcutaneous Injection Sites and Instructions for Safe Self Administration