Amazon.com: Neurogan GHK Cu Copper Peptide Hair & Scalp Serum 2400mg, 4% Copper Peptides Fast Absorbing, Water Based Formula for Hair Softness & Shine Cosmetic Dry Scalp Moisturizer Spray, Made in USA : A lot of people asked how I use GHK Cu (copper peptide) with a pen device, so here's a quick tutorial showing exactly how I do it. In this video I show how 7% GHK CU ACCELERANT Platinum Skin Care Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Copper Peptides Serum for Face 2% GHK CU & 4% EGF Seraphime