GHK-Cu Copper TriPeptide Nasal SprayGHK Cu + NAC Copper Peptide Nasal Spray is designed to support cellular regeneration and overall wellness. This nasal spray delivers GHK Cu directly into the bloodstream through the nasal mucosa for rapid absorption. As a mucolytic agent, NAC (N Acetylcysteine) reduces the viscosity of mucus, aiding in clearing the sinuses and reducing obstruction. Why is nasal spray GHK Cu better than capsule GHK Cu? Without a carrier system, oral forms of GHK Cu