Peptide Therapy for Hair Growth: Does It Really Work? IK Clinics GHK Cu for hair growth does it actually work? Short answer: no. GHK Cu can be great for skin but when it comes to hair growth, the evidence just isn't there. And this Neurogan Health GHK Cu Copper Peptide Hair & Scalp Serum 4% Serum, 2 oz 60 mL TikTok Shop AHK Cu + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan Neurogan Health Glow from within with GHK Cu Copper Peptide , This powerhouse peptide supports collagen production, skin repair, and hair follicle health, helping improve skin firmness, radiance, and support GHK Cu Peptide Progress: Week 3 Results