Ingredient or product comparison
GHK-Cu vs Copper Peptide: Nomenclature Comparison
The table below clarifies the relationship between the terms and what each designation actually specifies in research contexts. GHK-Cu Glycyl-L-histidyl-L-lysine tripeptide chelated with Cu²⁺ ion Complete. Specifies sequence and copper Biochemical research, pe
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- The table below clarifies the relationship between the terms and what each designation actually specifies in research contexts.
- GHK-Cu
- Glycyl-L-histidyl-L-lysine tripeptide chelated with Cu²⁺ ion
- Complete. Specifies sequence and copper
- Biochemical research, peer-reviewed publications, synthesis protocols
- None. Unambiguous molecular designation
- Preferred term for all research applications
- Copper Peptide
- Any peptide chelated with copper, often implies GHK-Cu without stating it
- Incomplete. Does not specify amino acid sequence
- Cosmetic formulations, dermatology literature, commercial products
- High. Could refer to GHK-Cu, AHK-Cu, or proprietary sequences
- Avoid in protocols. Clarify the exact peptide
- GHK (no copper)
- Free tripeptide Gly-His-Lys without chelated copper ion
- Complete for peptide sequence, but lacks copper
- Studies comparing copper-bound vs free peptide activity
- Moderate. Unambiguous peptide but missing active ion
- Distinct compound with reduced biological activity
- AHK-Cu
- Alanyl-histidyl-lysine tripeptide chelated with Cu²⁺
- Complete. Different peptide from GHK-Cu
- Comparative studies, cosmetic formulations
- None. Unambiguous but often conflated with GHK-Cu
- Related peptide, not identical. Verify which is intended