GHK-Cu
We've tested 317 samples of GHK-Cu sourced from 44 vendors between 22 Apr 2025 and 2 Mar 2026. Purity varies from 91.46% to 100.00%, and quantity can diverge by up to +/-505% vs advertised value.
Take Action
Suggest A Vendor
Test GHK-Cu
Mail in a sample for free testing (US only, terms apply)
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 | ||||||
| 3 | 6 Dec 2025 | 11 Feb 2026 | ||||||
| 4 | 23 Oct 2025 | 29 Dec 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 | ||||||
 | 8 | 14 Aug 2025 | 18 Feb 2026 | ||||||
| 7 | 25 Nov 2025 | 22 Feb 2026 | ||||||
| 4 | 16 Jul 2025 | 4 Aug 2025 | ||||||
 | 5 | 6 May 2025 | 10 Feb 2026 | ||||||
| 4 | 23 Oct 2025 | 17 Dec 2025 | ||||||
 | 8 | 16 Jul 2025 | 22 Feb 2026 | ||||||
| 8 | 4 Sep 2025 | 4 Feb 2026 | ||||||
| 8 | 4 Sep 2025 | 4 Nov 2025 | ||||||
| 9 | 17 Nov 2025 | 18 Feb 2026 | ||||||
| 6 | 6 Nov 2025 | 22 Feb 2026 | ||||||
| 8 | 17 Dec 2025 | 22 Feb 2026 | ||||||
 | 26 | 10 Jul 2025 | 18 Feb 2026 | ||||||
| 15 | 16 Jul 2025 | 11 Feb 2026 | ||||||
| 18 | 4 Aug 2025 | 10 Feb 2026 | ||||||
| 8 | 25 Nov 2025 | 9 Feb 2026 | ||||||
| 14 | 25 Sep 2025 | 22 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 | ||||||
 | 5 | 20 May 2025 | 10 Jul 2025 | ||||||
 | 5 | 4 Aug 2025 | 2 Feb 2026 | ||||||
 | 5 | 22 Apr 2025 | 10 Jul 2025 | ||||||
| 8 | 25 Sep 2025 | 22 Feb 2026 | ||||||
 | 7 | 10 Sep 2025 | 2 Feb 2026 | ||||||
| 32 | 16 Jul 2025 | 22 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 |
| 22 Feb 2026 | Yimei | View | 50mg | 47.6mg | -4.8% | 99.90% | n/a | (no batch ID) | No Label / Silver Crimp / Clear Cap | Lab E | Public | |
| 22 Feb 2026 | Mai Peptide | View | 100mg | 86mg | -14.0% | 99.90% | n/a | (no batch ID) | Silver Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 22 Feb 2026 | Shanxi Qianyecao Biotech QYC | View | 50mg | 50.1mg | +0.2% | 99.73% | n/a | (no batch ID) | White Label / Silver Crimp / White Cap | Lab E | Public | |
| 22 Feb 2026 | Yimei | View | 50mg | 43.8mg | -12.4% | 99.90% | n/a | XA5 | No Label / Silver Crimp / Clear Cap | Lab E | Public | |
| 22 Feb 2026 | HK Peptides | View | 50mg | 56.8mg | +13.6% | 99.90% | low | Cu50 clear cap | No Label / Copper Crimp / Clear Cap | Lab E | Public | |
| 22 Feb 2026 | Peptide-S | View | 100mg | 100mg | 99.76% | n/a | Dec2, 15. 2025 | (no data) | Lab E | Public | ||
| 22 Feb 2026 | Yimei | View | 50mg | 45mg | -10.0% | 99.90% | n/a | (no batch ID) | No Label / Silver Crimp / Clear 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.