GHK Cu Scalp Foam Wells Pharmacy Network 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 Helloskin GHK Cu 1% Triple Peptide Regenerative Serum Amazon.com: Lovely Southern GHK Cu Peptide Serum 1.5% Copper Peptides Anti Aging Facial Serum for Fine Lines, Skin Elasticity, Made in USA, 1 Fl Oz : Beauty & Personal Care What is the safe topical dosing, duration, and contraindications for the copperbinding peptide GHKCu for wound healing or antiaging?