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 GHK Cu Focal Point Vitality GHK: A comprehensive researcher's handbook Tydes Advanced GHK Cu Neck & Face Serum Premium Quality Neurogan Health Dimeric copper peptide incorporated hydrogel for promoting diabetic wound healing Nature Communications
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