AHK CU Dosage Guide: How Much to Use Daily Neurogan Health GHK Cu Peptide Therapy Brea, CA Orange County GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds,