GHK-Cu is the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine (MW ~403.9 Da as the copper complex), studied for skin and tissue repair. The key sourcing question is whether the material is actually copper-bound.
Verify the Copper Complex
Genuine GHK-Cu is a blue-tinted powder because of the bound copper; the free tripeptide (MW 340.38 Da) is not the same product. Require a COA confirming the copper complex and ≥98% purity — a vendor selling 'GHK' without copper is selling a different compound.
What to Look for
Third-party COA (HPLC and mass spectrometry), sealed vials, and clear labeling of the copper complex. For topical research use, sterile handling matters.
Typical Price Range
Research-grade GHK-Cu typically costs about $30–$50 per vial. It is inexpensive to produce, so unusually cheap material may be the uncomplexed peptide.
Red Flags to Avoid
No indication of copper binding, a non-blue powder, missing COAs, and human-use claims.
Top Recommended Source
Purgo Labs is our top-rated source based on third-party COA verification, research-grade purity, and transparent manufacturing. View at Purgo Labs.