Why Are People Injecting Themselves with Peptides? The New Yorker GHK Cu Sovereign Health Performance Copper, Collagen, and Controversy: Inside the GHK Cu Buzz The U.S. Food and Drug Administration is moving toward allowing compounding pharmacies to produce more than a dozen injectable peptides that were banned because of potentially significant safety risks, the New York GHK Cu Peptide Regenerative & Cosmetic Research