Dermatologists and longevity researchers are urging patients to stop short of injecting copper peptides, a compound that has moved from face serums to home syringes without a single published human study showing the injectable form is safe or effective.
The compound is GHK-Cu, a copper-bound string of three amino acids that has circulated in cosmetic products for decades. What changed is the route. People are now drawing the electric blue liquid into subcutaneous injections, often stacking it with other peptides marketed for tissue repair, and buying it from sellers who operate outside any regulatory system.
