Glow Peptide Protocol GHK Cu, BPC 157, TB 500 Neurogan Health Exciting news for the peptide world making these peptides easier to prescribe and likely dropping the prices for them. As always know your prescriber and avoid the gray market due to unregulated GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has What are GHK cu (Glycyl Histidyl Lysine Copper) injections?