GHK-Cu
We've tested 281 samples of GHK-Cu sourced from 41 vendors on #N/A. Purity varies from 91.46% 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 | ||
 | 9 | 4 Aug 2025 | 19 Jan 2026 | ||||||
 | 6 | 14 Jun 2025 | 11 Aug 2025 | ||||||
 | 2 | 6 May 2025 | 6 May 2025 | ||||||
| 2 | 25 Oct 2025 | 27 Oct 2025 | ||||||
| 4 | 23 Oct 2025 | 29 Dec 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 | ||||||
 | 4 | 14 Jun 2025 | 6 Dec 2025 | ||||||
 | 3 | 6 Aug 2025 | 25 Nov 2025 | ||||||
 | 4 | 20 May 2025 | 10 Jul 2025 | ||||||
 | 7 | 14 Aug 2025 | 9 Feb 2026 | ||||||
| 12 | 25 Sep 2025 | 9 Feb 2026 | ||||||
| 4 | 16 Jul 2025 | 4 Aug 2025 | ||||||
| 4 | 23 Oct 2025 | 17 Dec 2025 | ||||||
 | 7 | 16 Jul 2025 | 7 Nov 2025 | ||||||
| 8 | 4 Sep 2025 | 4 Feb 2026 | ||||||
| 8 | 4 Sep 2025 | 4 Nov 2025 | ||||||
| 7 | 17 Dec 2025 | 11 Feb 2026 | ||||||
 | 25 | 10 Jul 2025 | 4 Feb 2026 | ||||||
| 15 | 16 Jul 2025 | 11 Feb 2026 | ||||||
| 17 | 4 Aug 2025 | 4 Feb 2026 | ||||||
| 8 | 25 Nov 2025 | 9 Feb 2026 | ||||||
| 12 | 3 Oct 2025 | 11 Feb 2026 | ||||||
| 9 | 4 Aug 2025 | 19 Jan 2026 | ||||||
| 6 | 10 Jul 2025 | 13 Feb 2026 | ||||||
 | 4 | 6 May 2025 | 20 May 2025 | ||||||
 | 3 | 25 Apr 2025 | 6 May 2025 | ||||||
| 5 | 9 Oct 2025 | 26 Jan 2026 | ||||||
| 4 | 10 Jul 2025 | 20 Sep 2025 | ||||||
| 4 | 6 Nov 2025 | 11 Dec 2025 | ||||||
 | 5 | 20 May 2025 | 10 Jul 2025 | ||||||
 | 5 | 4 Aug 2025 | 2 Feb 2026 | ||||||
 | 5 | 22 Apr 2025 | 10 Jul 2025 | ||||||
| 6 | 25 Sep 2025 | 4 Feb 2026 | ||||||
 | 7 | 10 Sep 2025 | 2 Feb 2026 | ||||||
| 28 | 16 Jul 2025 | 11 Feb 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 | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 13 Feb 2026 | Xian Yihang Technology | View | 100mg | 103mg | +3.0% | 99.90% | below LOQ | (no batch ID) | Silver Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 11 Feb 2026 | Reta-Peptide | View | 100mg | 95.8mg | -4.2% | 99.90% | n/a | (no batch ID) | No Label / Green Crimp / Clear Cap | Lab E | Public | |
| 11 Feb 2026 | Tianjin Ruiwang New Material Technology Co | View | 100mg | 94.1mg | -5.9% | 99.77% | n/a | (no batch ID) | White Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 11 Feb 2026 | HK Peptides | View | 50mg | 51.4mg | +2.8% | 99.90% | n/a | CU50 | No Label / Silver Crimp / Violet Cap | Lab E | Public | |
| 11 Feb 2026 | HK Peptides | View | 100mg | 93.5mg | -6.5% | 99.90% | n/a | (no batch ID) | White Label / Silver Crimp / Red Cap | Lab E | Public | |
| 11 Feb 2026 | Mai Peptide | View | 100mg | 84.6mg | -15.4% | 99.90% | n/a | (no batch ID) | No Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 9 Feb 2026 | Xingruida XDR | View | 100mg | 54.8mg | -45.2% | 99.90% | n/a | (no batch ID) | No Label / Silver Crimp / Blue 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.