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 Copper Peptide Scalp Therapy FDA puts some peptides off limits Copper Peptides for Hair Serum GHK Cu for Hair PLU Labs
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why is my ghk cu not blue NOVA/GLOW GHK-CU TB500 BPC-157 COMBO