The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu = hype or real science?, Natural peptide, Declines with age, Strong lab data, But:, Topical = useful for skin and hair, Injectable = for injuries and inflammation , #GHKCu GHK Cu is not Botox. It does not freeze a single muscle. It works because it works at the matrix level. GHK Cu stimulates collagen and glycosaminoglycan synthesis, modulates the matrix metalloproteinases that govern GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration Ghk Cu Experienxe : r Peptides GHK Cu Scalp Solution Empower Pharmacy