GHK-Cu lab test results by vendor
How each vendor's GHK-Cu held up in independent third-party lab tests: purity, dose against the label, and how often vials failed.
What Is GHK-Cu? Benefits, Evidence & RisksWhat it does, what the research shows, and the known risks.For research use only. VendorVerify sells nothing and takes no money from vendors. No affiliate links, no coupon codes, no paid rankings. How scores work
- Vials tested
- 36
- Lab reports
- 20
- Vendors
- 11
- Vials failed
- 27.8%
- Median purity
- 99.91%
- Median dose vs label
- +20.9%
Results from Feb 2025 to Aug 2026. A vial fails if it's empty, under 95% pure, more than 20% under its label, or more than 50% over (10 of 36 vials).
Key facts
- VendorVerify holds lab results for 36 GHK-Cu vials from 11 vendors, from 20 independent lab reports dated Feb 2025 to Aug 2026.
- 27.8% of GHK-Cu vials on file failed (10 of 36), meaning empty, under 95% pure, more than 20% under label or more than 50% over.
- The median GHK-Cu vial on file tested at 99.91% purity.
- The median GHK-Cu vial on file held +20.9% compared with the amount on its label.
- 1 vendor has 5 or more GHK-Cu lab reports and is ranked for GHK-Cu.
GHK-Cu vendors
| Vendor | Verdict | Score | Failed vials | Lab reports | Median dose vs label | Avg. purity | Vendor page |
|---|---|---|---|---|---|---|---|
| SRY | Below marketFailed vials | 60.2 | 66.7% | 6 | +81.8% | 99.85% | View vendor SRY |
| Not enough data to rank (fewer than 5 lab reports) | |||||||
| ERP | Not ranked | 87.4 | 0.0% | 1 | −2.6% | 99.95% | View vendor ERP |
| Uther | Not ranked | 87.2 | 0.0% | 1 | +3.8% | 99.91% | View vendor Uther |
| SIYU | Not ranked | 87.2 | 0.0% | 1 | −5.8% | 99.67% | View vendor SIYU |
| ZLZ | Not ranked | 87.0 | 0.0% | 1 | +2.7% | 98.03% | View vendor ZLZ |
| APS | Not ranked | 86.9 | 0.0% | 1 | — | 99.51% | View vendor APS |
| FSD | Not ranked | 86.8 | 0.0% | 2 | +6.9% | 99.56% | View vendor FSD |
| SNP | Not ranked | 86.6 | 0.0% | 2 | +21.0% | 99.95% | View vendor SNP |
| XTP | Not ranked | 86.1 | 0.0% | 1 | −12.2% | 98.71% | View vendor XTP |
| TCI | Not ranked | 85.1 | 0.0% | 2 | +29.6% | 99.93% | View vendor TCI |
| SSA | Not rankedFailed vials | 84.1 | 15.2% | 2 | +4.4% | 99.84% | View vendor SSA |
Every GHK-Cu vial against its label
One dot per vial, placed by how much it held compared with the amount on the label.
Dot chart of 33 vials (every GHK-Cu vial on file), each placed by its measured amount compared with the label, from 50% under to 50% over. 6 are within 5% of the label, 17 are 5 to 20% under or more than 5% over, 10 are more than 20% under or more than 50% over, and 0 were empty.
GHK-Cu: common questions
Which GHK-Cu vendors pass lab testing?
Among vendors with at least 5 lab reports for GHK-Cu, the highest scores currently go to SRY (score 60.2, 66.7% of vials failed). 1 vendor is ranked for GHK-Cu in all, and the table on this page lists every vendor's results. Rankings change as new reports arrive.
How often do GHK-Cu vials fail testing?
10 of 36 GHK-Cu vials on file failed (27.8%). A vial fails if it's empty, under 95% pure, more than 20% under its label, or more than 50% over it.
Are GHK-Cu vials underdosed?
Usually not; if anything they run over. The typical GHK-Cu vial on file held +20.9% compared with the amount on its label. Individual vials vary much more than that, and the chart on this page shows every one.
What purity do GHK-Cu vials test at?
The median GHK-Cu vial tested at 99.91% purity. We count anything under 95% as a failed vial and give full marks for purity at 99.5% or higher, because small differences above that are within normal lab-to-lab variation.
Where do these GHK-Cu results come from?
From 20 independent lab reports, mostly commissioned by buyers, covering 36 vials from 11 vendors, dated Feb 2025 to Aug 2026. VendorVerify doesn't test anything itself. A report a vendor paid for is only used if the lab can verify it, and it is marked as vendor-commissioned and counts at half weight.
Does VendorVerify sell GHK-Cu?
No. VendorVerify doesn't sell peptides of any kind. VendorVerify sells nothing and takes no money from vendors. No affiliate links, no coupon codes, no paid rankings.