GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not What are the potential side effects and adverse reactions of topical copper peptide? Can a patient with a history of liver or kidney disease, such as Wilson's disease or hemochromatosis, overdose on copper from Gly His Lys Copper (GHK Cu)? Can GHK Cu Be Taken Orally? Oral GHK Cu Bioavailability, Tablets & Copper Peptide Safety Neurogan Health