is 4.5 mg ghk cu too much daily GHK-Cu Peptides Before and After: Dosage, Benefits & How It Works for Skin and Hair GHK-Cu - The Doctors Protocol
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The researchers reported that administering the peptide to mice reduced CGRP-induced plasma protein extravasation (PPE), indicating the antagonistic effects of the peptide in vivo
For active melasma, combine with azelaic acid or tranexamic acid under dermatology guidance

The digestive process breaks down most nutrients before they ever reach your bloodstream

Cell 87(7):11611169 Heljasvaara R et al (2005) Generation of biologically active endostatin fragments from human collagen XVIII by distinct matrix metalloproteases