GHK-Cu
We've tested 113 samples of GHK-Cu sourced from 26 vendors between 22 Apr 2025 and 27 Oct 2025. Purity varies from 99.32% to 100.00%, and quantity can diverge by up to +/-120% vs advertised value.
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Vendors
| Tests | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Vendor | Rating | Count | Avg | Min | Max | Oldest | Most Recent | ||
 | 6 | 4 Aug 2025 | 9 Oct 2025 | ||||||
 | 6 | 16 Jul 2025 | 21 Aug 2025 | ||||||
 | 6 | 14 Jun 2025 | 11 Aug 2025 | ||||||
 | 2 | 6 May 2025 | 6 May 2025 | ||||||
 | 4 | 6 May 2025 | 20 May 2025 | ||||||
 | 4 | 6 May 2025 | 20 May 2025 | ||||||
 | 2 | 10 Jul 2025 | 10 Jul 2025 | ||||||
 | 2 | 6 May 2025 | 6 May 2025 | ||||||
 | 4 | 6 May 2025 | 10 Jul 2025 | ||||||
 | 3 | 14 Jun 2025 | 10 Jul 2025 | ||||||
 | 4 | 20 May 2025 | 10 Jul 2025 | ||||||
 | 14 | 10 Jul 2025 | 21 Oct 2025 | ||||||
| 4 | 4 Aug 2025 | 9 Oct 2025 | ||||||
| 4 | 16 Jul 2025 | 4 Aug 2025 | ||||||
| 6 | 16 Jul 2025 | 21 Oct 2025 | ||||||
| 7 | 16 Jul 2025 | 7 Oct 2025 | ||||||
 | 4 | 6 May 2025 | 20 May 2025 | ||||||
 | 3 | 25 Apr 2025 | 6 May 2025 | ||||||
| 3 | 9 Oct 2025 | 9 Oct 2025 | ||||||
| 4 | 10 Jul 2025 | 20 Sep 2025 | ||||||
 | 5 | 20 May 2025 | 10 Jul 2025 | ||||||
 | 5 | 22 Apr 2025 | 10 Jul 2025 | ||||||
 | 3 | 10 Sep 2025 | 10 Sep 2025 | ||||||
 | 1 | 16 Jul 2025 | 16 Jul 2025 | ||||||
 | 1 | 20 May 2025 | 20 May 2025 | ||||||
Most recent GHK-Cu tests
Samples are tested in commercial labs
| Quantity | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Vendor | Certificate | Test Score | Label | Tested | Difference | Purity | Batch ID | Container | Tested At | Sent By |
| 21 Oct 2025 | Qing Li Peptide | View | 50mg | 48.100mg | -3.8% | 99.93% | Jul 15 2025 | No Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 21 Oct 2025 | HK Peptides | View | 50mg | 53.600mg | +7.2% | 99.95% | (no batch ID) | No Label / Silver Crimp / White Cap | Lab E | Public | |
| 9 Oct 2025 | Uther | View | 50mg | 53.500mg | +7.0% | 99.95% | HK500802 | White Label / Blue Crimp / Clear Cap | Lab E | Vendor | |
| 9 Oct 2025 | ZLZ Peptide | View | 50mg | 53.500mg | +7.0% | 99.95% | (no batch ID) | No Label / Silver Crimp / White Cap | Lab E | Public | |
| 9 Oct 2025 | Shanghai Sigma Audley SSA | View | 50mg | 47.000mg | -6.0% | 99.94% | (no batch ID) | No Label / Silver Crimp / Clear Cap | Lab E | Public | |
| 9 Oct 2025 | ZLZ Peptide | View | 50mg | 56.600mg | +13.2% | 99.95% | (no batch ID) | Pink Label / Copper Crimp / Clear Cap | Lab E | Public | |
| 9 Oct 2025 | Uther | View | 50mg | 53.500mg | +7.0% | 99.94% | HK500802 | White Label / Blue Crimp / Clear Cap | Lab E | Vendor | |
Corrections
- 31 Jul 2025: Peptidology
- Peptidology ratings for GHK-Cu were updated from B to A, after taking into account the Batch IDs that are included on vials, but were initially not identified by Finnrick.
- 10 Jul 2025:
- Lab E tests published 10 Jul 2025: change in testing and analysis methodology on 15 GHK-Cu tests previously published in May and June. New COAs were issued by the lab, and test scores have been updated.
Launch with Finnrick
Some of the samples listed on this page were submitted by their vendor, as part of the Launch with Finnrick vendor support program.
The program is designed to help vendors get listed on the Finnrick web site while protecting the integrity of our rating system.
The vendor submitted four samples per product, two of which were tested by Finnrick for identity, purity and quantity according to our usual process. The vials were anonymized before being sent to the testing lab.