How to verify GHK-Cu is authentic
Step-by-step guide to verifying your GHK-Cu is genuine: checking the COA, matching the batch number, and downloading from the product page.
Step 1: Locate the batch number
Every Peptify GHK-Cu vial has a batch (lot) number printed on the label. Note this number down — it should match the Certificate of Analysis published on the product page for that specific batch.
Step 2: Download the COA from the product page
The batch-specific COA for your GHK-Cu is downloadable directly from the product page on peptifyuk.com. This is the most reliable verification method because the document is hosted under our control, tied to the batch number, and includes the original HPLC chromatogram image plus mass spectrometry data.
If a supplier does not publish batch-specific COAs or only provides a generic purity claim, that is a significant red flag.
Step 3: Check the HPLC peak
On the COA, look at the HPLC chromatogram. A genuine GHK-Cu sample should show a single dominant peak at the expected retention time, with purity >99% (peak area). The mass spectrometry section should confirm the molecular weight matches the theoretical mass of GHK-Cu.
Any chromatogram with multiple large peaks, or where the purity percentage looks inconsistent with the visible peak, should prompt you to contact the supplier for clarification.
Buy GHK-Cu for research
99%+ HPLC-verified GHK-Cu in stock. Every vial ships from the UK with a batch-specific Certificate of Analysis. Same-day dispatch on orders before 1pm.
Frequently asked questions
What does GHK-Cu do in research?
GHK-Cu stimulates collagen types I, III, and V, alongside elastin and proteoglycans. It is studied in the skin-regeneration, epithelial-barrier, and tissue-remodelling research literature.
What is the difference between 50mg and 100mg?
Both contain the same 99%+ purity GHK-Cu. The 100mg vial provides a larger quantity for extended research protocols.
Is GHK-Cu the same as copper peptide?
Yes. GHK-Cu is the scientific name for the copper tripeptide (Glycyl-L-Histidyl-L-Lysine Copper Complex) commonly referred to as copper peptide.