GHK Cu is a naturally occurring copper peptide that has been shown to have numerous beneficial properties, particularly in skin care and tissue regeneration. tI has gained popularity due to its A GHK Cu face serum appears blue because the active ingredient, GHK Cu ( copper peptide), is naturally a blue colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue GHK Cu (100MG) LYOPHILIZED TENNESSEE PEPTIDES Amazon.com: Ewecxine GHK Cu Copper Peptide Supplement, 300 mcg per Serving, Liposomal Formula, 100 Vegan Capsules Beauty Support Matrix with Biotin, Phytoceramides & Herbal Blend : Health & Household The Pretty Purple Peptide with Powerful Benefits That gorgeous blue purple solution isn't just for looksit's GHK Cu, one of the most studied peptides in regenerative medicine. Here's what it can do for GHK CU 100MG blueridgepeptides.com