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, GHK Cu Copper Peptide: The Ultimate Peptide For Longevity Everything you need to know about GHK Cu WHAT IS IT? A copper peptide your body naturally produces but production drops by 60% by age 60. It's one of the most Sublingual GHK Cu TruHealth Physical Therapy GHK Cu Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health GHK Cu Injectable Team Wellcore