Ghk cu Copper Peptide Serum Anti Aging & Firming Care GHK Cu isn't just' a skin peptide. The gene expression data is why it keeps showing up in longevity reviews. Follow @lebaneselabs for daily peptide research. Copper Peptide (GHK Cu) 2% Recovery Serum Topical or SubQ GHK Cu? Same molecule. Very different purposes. Topical you apply it on your skin. Think of it as feeding your skin from the outside. In a 12 week study of
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