The Science Behind Hairgenetix Copper Peptide Hair Growth GHK Cu Peptide Progress: Week 3 Results Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule Microneedling creates micro injuries in your scalp., Those injuries attract growth factors. Stimulate collagen. Stimulate elastin. Wake up hair follicles., Works better combined with PRP, exosomes, or Restoracell with Copper Peptides, a Great Partner for Microneedling Vitali Skincare