My skin secret at almost 50 , As an esthetician turning the BIG 5 0 this year (and someone who has lost 95 pounds over the past five years) Im constantly testing ways to improve my skin, hair, GHK Cu, the copper peptide, is a game changing injectable for radiant skin and so much more Here's what it can do: Boost collagen for smoother, firmer skin Anti aging Copper Peptide Serum GHK Cu + Argireline + Matrixyl 3000 Copper Peptides Serum for Face 2% GHK CU & 4% EGF Seraphime GHK Cu 50mg GHK Cu (10 mg, 50 mg, 100 mg) COA verified peptide Nootropix