do i need to take zinc with ghk cu ghk-cu and zinc Most people treat GHK-Cu like it's only for hair and skin. The Multi-Peptide + Copper Peptides 1%
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[PubMed] [Google Scholar] 50.Stein C., Kuchler S
But more serious cases may cause severe bleeding in any part of the body

But when it comes to B12, the big question is: how

Once reconstituted, the solution should be used promptly or aliquoted and stored at -20C to avoid repeated freeze-thaw cycles, which can degrade the compound

Copper peptides vs retinoids Retinoids (retinol, tretinoin, adapalene) remain the "gold standard" for wrinkle treatment based on decades of research and FDA approval for wrinkle reduction
That doesn't make 90471 correct