GHK-Cu frequently asked questions
Answers about GHK-Cu, how it is tested, how to read and verify its certificates, ordering, and GHK-Cu Labs. Figures update automatically from the current lot data.
Last updated
Product
What is GHK-Cu?
GHK-Cu is a copper(II) complex of the tripeptide Gly-His-Lys. GHK-Cu Labs supplies it as a blue lyophilized powder in 50 mg, 100 mg vials, with an independent certificate of analysis for every lot.
What is GHK-Cu research material?
GHK-Cu research material is GHK-Cu supplied for laboratory research, sold by lot, with each lot's identity, purity and net content documented by an independent laboratory in a published certificate of analysis.
What is the molecular formula and weight of GHK-Cu?
The molecular formula (GHK peptide, without copper) is C14H24N6O4 and the average molecular weight is 340.38 g/mol. The peptide has 3 residues.
How should GHK-Cu be stored?
Store sealed, dry and protected from light at the temperature stated on the vial label. Allow a cold vial to reach room temperature before opening.
What is GHK-Cu?
The copper(II) complex of the tripeptide glycyl-histidyl-lysine (GHK), also called copper tripeptide-1.
What sizes is GHK-Cu sold in?
50 mg and 100 mg vials through Klow.bio. The current published lot is a 100 mg vial that measured 129.78 mg.
Testing and quality
How is GHK-Cu analyzed?
GHK-Cu is analyzed with complementary methods: HPLC-UV for purity, LC-MS for identity, a quantitative measurement for net content, and, where listed, LAL endotoxin and PCR microbial testing. Results are published per lot at ghkcu.bio/coa/.
Who tests GHK-Cu?
Every lot is tested by Freedom Diagnostics, an independent third-party analytical laboratory. GHK-Cu Labs does not test its own material for published certificates.
What purity does GHK-Cu test at?
Current lots report HPLC-UV purity 99.81%, against a stated release specification of ≥95%. The most recent result is 99.81% for lot KB10020.
How is the identity of GHK-Cu confirmed?
By liquid chromatography–mass spectrometry (LC-MS), performed by Freedom Diagnostics on every lot. LC-MS separates the sample and measures the mass of the main component, confirming it has the molecular weight expected for the compound.
Is GHK-Cu tested for endotoxin?
Endotoxin and microbial testing are reported per lot. Every lot page in the COA archive states whether those tests were performed.
What is HPLC testing, and what does the purity percentage mean?
HPLC (high-performance liquid chromatography) separates a sample's components so each appears as a peak. The purity percentage is the main peak's share of all UV-detected peak area. It does not confirm identity (the separate LC-MS test does) or measure the amount of peptide in the vial (net content does).
Certificates of analysis
What is a GHK-Cu COA?
A GHK-Cu certificate of analysis is the testing laboratory's report for one lot: the lot number, test dates, methods and results for purity, identity and net content. GHK-Cu Labs publishes every lot's COA as a readable page at ghkcu.bio/coa/.
Where can I find the COA for my vial?
Find the lot number printed on your vial label and enter it at ghkcu.bio/verify/, or open that lot in the COA archive at ghkcu.bio/coa/.
How do I confirm a COA with the laboratory?
Scan the Freedom Diagnostics QR code printed on the certificate, then search for klow.bio under the Company tab to view the laboratory record.
Why is the measured net content different from the vial size?
Net content is the laboratory's measurement of peptide in the tested vial. Current lots measured 129.78 mg in a 100 mg vial.
Buying GHK-Cu
Where can I buy GHK-Cu?
Current GHK-Cu research material availability is provided through Klow.bio, the purchasing platform operated by Klow Labs: https://klow.bio/product/ghk-cu-peptide/ Lot records, testing information and certificates of analysis are published on ghkcu.bio so they can be reviewed before purchasing.
Can I order GHK-Cu?
Yes. Purchasing information and current availability for GHK-Cu research material are provided through Klow.bio: https://klow.bio/product/ghk-cu-peptide/
Is every GHK-Cu lot independently tested?
Yes. Every lot is tested by Freedom Diagnostics, an independent laboratory, for HPLC-UV purity, LC-MS identity and net content. The stated release specification is ≥95% HPLC-UV purity with identity confirmed by LC-MS. The current lot, KB10020, reported 99.81% purity.
How can I verify a GHK-Cu lot?
Enter the lot number from your vial label at ghkcu.bio/verify/ to see that lot's results. To confirm with the laboratory directly: Scan the Freedom Diagnostics QR code printed on the certificate, then search for klow.bio under the Company tab to view the laboratory record.
How much does GHK-Cu cost?
The current price is from $29.99 to $39.99 depending on size, with bundle pricing (2 vials save 5%; 3 or more vials save 10%). Current pricing is always listed on Klow.bio.
How fast does GHK-Cu ship?
Orders ship the next business day. Same-day cutoff is 4:00 PM CT, with overnight and 2-day options at checkout.
Company
Who is GHK-Cu Labs?
GHK-Cu Labs is a dedicated GHK-Cu research supplier with a controlled sourcing and quality-assurance program. Research material is sourced through our qualified manufacturing supply chain and subjected to analytical testing and lot-level documentation before release. GHK-Cu Labs is operated by Klow Labs LLC in Chicago, IL. Purchasing is handled through Klow.bio.
Who operates GHK-Cu Labs?
GHK-Cu Labs is operated by Klow Labs LLC, 3838 N Ravenswood Ave PMB 2027, Chicago, IL 60613. Klow Labs LLC also operates klow.bio.
Does GHK-Cu Labs provide medical or usage advice?
No. GHK-Cu Labs supplies research material and publishes analytical documentation. It does not provide medical advice, dosing, administration guidance or protocols.
How do I contact GHK-Cu Labs?
Email contact@klow.bio, call (708) 262-7687, or use the contact form at ghkcu.bio/contact/.
Didn't find your answer? Contact GHK-Cu Labs and include your lot number if your question is about a specific vial.
Buy GHK-Cu
50 mg and 100 mg vials. Current lot KB10020 tested at 99.81% purity with identity confirmed by LC-MS. Current purchasing is available through Klow.bio.