GHK-Cu
We've tested 229 samples of GHK-Cu sourced from 40 vendors between 22 Apr 2025 and 15 Jan 2026. Purity varies from 99.00% to 100.00%, and quantity can diverge by up to +/-148% vs advertised value.
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Vendors
| Tests | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Vendor | Rating | Count | Avg | Min | Max | Oldest | Most Recent | ||
 | 8 | 4 Aug 2025 | 7 Nov 2025 | ||||||
 | 6 | 14 Jun 2025 | 11 Aug 2025 | ||||||
 | 2 | 6 May 2025 | 6 May 2025 | ||||||
| 2 | 25 Oct 2025 | 27 Oct 2025 | ||||||
| 5 | 4 Sep 2025 | 6 Jan 2026 | ||||||
| 4 | 23 Oct 2025 | 29 Dec 2025 | ||||||
 | 4 | 6 May 2025 | 20 May 2025 | ||||||
 | 4 | 6 May 2025 | 20 May 2025 | ||||||
| 5 | 25 Nov 2025 | 6 Jan 2026 | ||||||
 | 2 | 10 Jul 2025 | 10 Jul 2025 | ||||||
 | 2 | 6 May 2025 | 6 May 2025 | ||||||
 | 4 | 6 May 2025 | 10 Jul 2025 | ||||||
 | 4 | 14 Jun 2025 | 6 Dec 2025 | ||||||
 | 3 | 6 Aug 2025 | 25 Nov 2025 | ||||||
 | 4 | 20 May 2025 | 10 Jul 2025 | ||||||
| 10 | 25 Sep 2025 | 15 Jan 2026 | ||||||
| 4 | 16 Jul 2025 | 4 Aug 2025 | ||||||
 | 4 | 14 Aug 2025 | 6 Jan 2026 | ||||||
| 4 | 23 Oct 2025 | 17 Dec 2025 | ||||||
 | 7 | 16 Jul 2025 | 7 Nov 2025 | ||||||
| 8 | 4 Sep 2025 | 4 Nov 2025 | ||||||
 | 22 | 10 Jul 2025 | 6 Jan 2026 | ||||||
| 13 | 16 Jul 2025 | 25 Nov 2025 | ||||||
| 13 | 4 Aug 2025 | 6 Jan 2026 | ||||||
| 9 | 3 Oct 2025 | 6 Jan 2026 | ||||||
| 8 | 4 Aug 2025 | 6 Jan 2026 | ||||||
 | 4 | 6 May 2025 | 20 May 2025 | ||||||
 | 3 | 25 Apr 2025 | 6 May 2025 | ||||||
| 4 | 9 Oct 2025 | 6 Nov 2025 | ||||||
| 4 | 10 Jul 2025 | 20 Sep 2025 | ||||||
| 4 | 6 Nov 2025 | 11 Dec 2025 | ||||||
| 4 | 17 Dec 2025 | 6 Jan 2026 | ||||||
 | 5 | 20 May 2025 | 10 Jul 2025 | ||||||
 | 3 | 4 Aug 2025 | 18 Nov 2025 | ||||||
| 5 | 10 Jul 2025 | 25 Nov 2025 | ||||||
 | 5 | 22 Apr 2025 | 10 Jul 2025 | ||||||
 | 6 | 10 Sep 2025 | 6 Nov 2025 | ||||||
| 15 | 16 Jul 2025 | 6 Jan 2026 | ||||||
 | 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 |
| 15 Jan 2026 | LiliPeptide | View | 100mg | 80mg | -20.0% | 99.95% | (no batch ID) | No Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 6 Jan 2026 | Oupeptide | View | 100mg | 96.1mg | -3.9% | 99.63% | (no batch ID) | No Label / Silver Crimp / Clear Cap | Lab E | Public | |
| 6 Jan 2026 | ZLZ Peptide | View | 50mg | 52.2mg | +4.4% | 99.00% | 09012025 | White Label / Silver Crimp / White Cap | Lab E | Public | |
| 6 Jan 2026 | Xingruida XDR | View | 50mg | 49.4mg | -1.2% | 99.95% | 2025.02.27 | White Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 6 Jan 2026 | Qing Li Peptide | View | 50mg | 51.4mg | +2.8% | 99.95% | CU50-10/25 | No Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 6 Jan 2026 | Tianjin Ruiwang New Material Technology Co | View | 50mg | 52.1mg | +4.2% | 99.95% | (no batch ID) | No Label / Silver Crimp / White Cap | Lab E | Public | |
| 6 Jan 2026 | Tianjin Ruiwang New Material Technology Co | View | 50mg | 51.2mg | +2.4% | 99.95% | (no batch ID) | No Label / Silver Crimp / White Cap | Lab E | Public | |
Corrections
- 17 Nov 2025: Peptide Sciences
- Test results for sample rkh8jub were published from 31 Oct to 17 Nov 2025, but did not belong to Peptide Sciences: the sample was misidentified, and re-attributed to the correct vendor.
- 11 Nov 2025: Peptide Powder Home
- The sample was misslabaled by the requester, actual quantity for this sample is 50 mg, Quantity has been edited with correct value (previus value was 5 mg) and a new lab result.
- 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.