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, Is GHK Cu Legal? FDA Approved Peptides Neurogan Health GHK CU 100mg Cellgenic 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 Science Behind the Benefits of GHK Cu UK SARMS SYNTHAGEN LABORATORIES NL GHK CU TETRAPEPTIDE + CU For Skin Regeneration For Wrinkles and Scars Treatment Peptides for Skin For Hair Pattern and Thickness : Amazon.ie: Beauty