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It has a sequence of Gly-His-Lys (glycine, histidine, and lysine,) which readily binds with copper to form the copper tripeptide

BPC-157 & Wound Healing Skin, Burns, Diabetic Ulcers & Fistulas (PMC, 2021) A comprehensive wound healing review published in Frontiers in Pharmacology documented BPC-157s practical applicability across skin wound types incisional, excisional, deep burns, diabetic ulcers, alkali burns, and fistula healing confirming equivalent efficacy regardless of route of application (systemic or local) and across the same dose range

The GHK-Cu peptide supplement liquid drops are an oral supplement designed for convenience

This early work established the principle that GHK-Cu acts as a signalling molecule rather than simply a structural component, setting the stage for decades of investigation across multiple research domains