DIY] Weird Slime in DIY GHK Cu Peptide Serum HELP : r SkincareAddiction Not all Copper Peptides are created equal If you've tried copper peptides before and saw no change, here is why: Concentration and Stability. Most serums use a diluted solution that barely scratches Neurogan Copper Peptide Hair Scalp Serum for Fuller Softer Shinier Hair Walmart.com Copper Peptide Masks: DIY Solutions for Harsh Winters