Copper Peptides for Effective Hair Growth GHK Cu (Copper Peptide) has emerged as one of the most promising regenerative peptides for hair restoration due to its ability to stimulate follicular activity, improve scalp circulation, reduce inflammation, and prolong the GHK Cu before and after : r Biohackers GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health AHK Cu + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan Neurogan Health Peptide Therapy for Hair Growth: Explore Your Options