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 Injectable GHK Cu Peptide Buy Online Pure Hydration GHK Cu has been studied for decades. Clinical research shows it supports firmer, tighter looking skin, improves overall texture, and helps bring your skin back to a more youthful state., Even better? Copper Peptides Serum for Face 2% Copper Peptide with 4% Epidermal Growth Factor (EGF Serum) Niacinamide Ceramides Squalane & Hyaluronic Acid Multi GHK Cu 50 mg cellugenixpeptides.io