GHK-Cu testing.
Copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine.
The short answer
GHK-Cu is tested by reverse-phase HPLC (UV 214 nm): chromatographic purity plus duplicate quantification in mg per vial against a qualified commercial reference standard. Identity is assessed by retention time against the same standard, with mass-spectrometry confirmation available as an add-on. €99 per vial, 48–72 h target turnaround, and the result is published in the public database.
What the analysis measures
Purity, quantity, identity
- Chromatographic purity (%). The main peak's share of total integrated area at UV 214 nm. It is a ratio of peptide-related peaks — not a claim about absolute mass content.
- Quantity (mg/vial). Measured content against a qualified commercial reference standard, run in duplicate; both values appear on the certificate next to the label claim.
- Identity. Retention time against the reference standard. That is presumptive identity, and the certificate says so; a mass-spectrometry match (+€79 add-on) confirms it conclusively.
The complete method — column, gradient, wavelength, limits — is published on the open method page.
Reference parameters
The molecule on paper
| Molecular weight | 400.90 Da |
| Molecular formula | C14H21CuN6O4- |
| Class | Copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine. |
| Also seen as | Copper peptide, copper tripeptide-1 |
| Tariff category | Recovery & repair |
| Reference basis | A qualified commercial reference standard |
Parameters as recorded in PubChem, rounded. Your supplier's salt form and net-peptide content will differ from free-peptide values.
Worth knowing
Before you test GHK-Cu
GHK-Cu testing quantifies the peptide by UV chromatography. The copper complexation state is not measured by this method — elemental copper requires a different technique — and the certificate states that limit explicitly rather than implying otherwise. For most quality questions (is it GHK, how much, how pure) the chromatographic answer is the relevant one.
Price
€99 per vial, published
GHK-Cu testing is €99 at the published founder rate — see its row in the price list. Add-ons: mass-spectrometry identity confirmation +€79 (adds 5–7 days), extended CoA data +€15, additional report +€29 (at order creation), rush +50%, additional vial of the same lot −30%.
On the certificate
What the CoA shows
- Measured quantity in duplicate, next to the label claim.
- Chromatographic purity with the full impurity table, not just the headline figure.
- The identity basis, stated: retention-time (presumptive) or mass-spectral (confirmed).
- Method reference and version, so the numbers can be interrogated.
- A public database entry — every result is published, verifiable by anyone, good or bad.
New to certificates? Read how to read a peptide CoA and how to verify one.
FAQ
GHK-Cu testing questions
Do you measure the copper content of GHK-Cu?
No — the published method quantifies the peptide by reverse-phase HPLC with UV detection. Elemental copper determination is a different technique and is not part of this analysis; the certificate states this limit explicitly.
How much does GHK-Cu testing cost?
€99 per vial at the published founder rate: chromatographic purity plus duplicate quantification in mg per vial, with the result published in the public database. Mass-spectrometry identity confirmation is +€79, extended CoA data +€15, and an additional report +€29 at order creation.
How long does GHK-Cu testing take?
The target turnaround is 48–72 hours from sample receipt. A rush option at +50% moves the sample to the front of the queue; the mass-spectrometry add-on adds 5–7 days.
Same category
Also tested in Recovery & repair
BPC-157 · TB-500 / Thymosin β-4 fragment — or see the full price list.
Iberian Analytical opens in Q1 2027 — €99 per test, 48–72 h target, and every result published in a public database, mandatory and free. Nothing is sold on this site today. Leave an email and we will write once, when the laboratory starts issuing certificates.
Testing for a business? Apply for a trade account — volume tiers and a 24-month rate lock.