GHK Cu (50 MG) Sigma Compounds GHK Cu Copper Peptide Hair & Scalp Serum GHK Cu 10 g (10% Concentrate, 100,000 ppm) Lrak Technologies 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
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