GHK Cu Peptide The benefits, side effects, and more [2026] GHK Cu: My secret weapon for skin, hair, and healing, I use it two ways topical cream for my face, and subQ injections 3x a week., It boosts collagen, tightens skin, helps hair grow, and even Injectable vs Topical Peptides: Should You Use Them for Anti Aging and Longevity? Fraley What's the difference between GHK Cu (copper peptide) as a topical cream vs an injection? In this video I break down: What GHK Cu is and why it's used in anti aging skincare