ZLZ Peptide
GHK-Cu
Finnrick tested 7 samples of GHK-Cu from ZLZ Peptide between 4 Aug 2025 and 29 Dec 2025. Test scores average over 5, no score below 4, and at least 6 tests warrant a confident Finnrick Rating of C (Okay).
Finnrick Rating™
ZLZ Peptide
GHK-Cu
Tested 7 Samples
Last test 29 Dec 2025
Take Action
Researcher
Request Full Data Access to the Finnrick database of peptide tests.
Free peptide testing
Mail in a sample (US only) to get confidence for the specific vials you have, and contribute to identifying unsafe supply chains, so other people can avoid risky and costly mistakes.
Other GHK-Cu tests from top-rated vendors:
All GHK-Cu tests from ZLZ Peptide
Samples are tested in commercial labs
Tests Count
7
Scores
AVGMINMAX
Last
29 Dec 2025
First
4 Aug 2025
| Quantity | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Test Score | Label | Tested | Difference | Purity | Batch ID | Container | Tested At | Sent By |
| 29 Dec 2025 | View | 50mg | 56.6mg | +13.2% | 99.81% | (no batch ID) | No Label / Copper Crimp / Clear Cap | Lab E | Public | |
| 18 Nov 2025 | View | 50mg | 78.6mg | +57.2% | 99.93% | (no batch ID) | No Label / Silver Crimp / Violet Cap | Lab E | Public | |
| 17 Nov 2025 | View | 50mg | 48.8mg | -2.4% | 99.95% | (no batch ID) | No Label / Copper Crimp / Clear Cap | Lab E | Public | |
| 9 Oct 2025 | View | 50mg | 53.5mg | +7.0% | 99.95% | (no batch ID) | No Label / Silver Crimp / White Cap | Lab E | Public | |
| 9 Oct 2025 | View | 50mg | 56.6mg | +13.2% | 99.95% | (no batch ID) | Pink Label / Copper Crimp / Clear Cap | Lab E | Public | |
| 3 Oct 2025 | View | 100mg | 111mg | +11.0% | 99.95% | (no batch ID) | No Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 4 Aug 2025 | View | 100mg | 89.8mg | -10.2% | 99.92% | (no batch ID) | No Label / Silver Crimp / Blue Cap | Lab E | Public | |