Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Amazon.com: GHK Cu Copper Peptide Supplement, Anti aging and revitalizing skin, strengthening hair roots: Precision nutrition capsules improve skin elasticity and increase hair density, 90 vegan capsules. : Health & Household GHK Cu (1) Quality Approved 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 Peptide: What It Does for Body Composition and Metabolic Health GHK Cu Copper Peptide Body Lotion Anti Aging Skin Tightening Anti Wrinkle 10 fl oz Walmart.com