does ghk cu make your skin tighter Is GHK-Cu enough to tighten loose after major fat loss? : r/Peptidesource Skin Perfection GHK-Cu Copper Peptide

First, the chemical identification was performed once, with the methodology of the 1970s, and was not subsequently re-verified by modern peptide sequencing a point Kovalzon and Strekalova later flagged as a source of doubt about whether the isolated nonapeptide was a single defined entity or a mischaracterized fraction of a larger precursor (Kovalzon & Strekalova, 2006)

It is a standard solvent in peptide preparation protocols

Proc Natl Acad Sci USA 1983

Is topical GHK-Cu safe

Local injection near the injury site concentrates the peptide where its needed

Additive side effects remain theoretically possible, where both peptides contribute to similar adverse effects