Ingredient or product comparison
GHK-Copper Same as GHK-Cu: Formulation Comparison
When sourcing GHK-Copper or GHK-Cu for research, the compound identity is fixed—but formulation details vary across suppliers and affect reconstitution, stability, and experimental consistency. The table below compares key formulation parameters you'll encount
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- When sourcing GHK-Copper or GHK-Cu for research, the compound identity is fixed—but formulation details vary across suppliers and affect reconstitution, stability, and experimental consistency. The table below compares key formulation parameters you'll encounter when evaluating product specifications.
- Chemical identity
- Gly-His-Lys complexed with Cu²⁺
- Identical molecular structure and copper coordination regardless of nomenclature
- Typical purity (HPLC)
- ≥98% for research-grade
- Purity specification is independent of product name—always verify COA, not label
- Molecular weight
- ~404 Da (copper-peptide complex)
- Molecular weight identical; counterion (acetate, chloride) may add 50–100 Da but doesn't affect bioactivity
- Copper coordination
- Pre-complexed during synthesis
- Both supplied as fully coordinated complex—no post-reconstitution copper addition required
- Common counterion
- Acetate or chloride
- Counterion affects solubility slightly but not peptide-copper binding or mechanism of action
- Storage requirement
- −20°C lyophilised, 2–8°C reconstituted
- Storage conditions identical; avoid repeated freeze-thaw cycles regardless of product name
- The bottom line: GHK-Copper and GHK-Cu are not formulation variants—they're nomenclature variants for the same compound. Procurement decisions should focus on purity (≥98% by HPLC), certificate of analysis verification, and supplier reliability, not whether the label says 'Copper' or 'Cu.' If a supplier offers both 'GHK-Copper' and 'GHK-Cu' as separate products at different prices, contact them directly—they're either selling the same compound under two names (common) or one is a different formulation (apo-peptide, different salt form) that should be explicitly specified in the product description.