ZLZ Peptide
TB-500
Finnrick tested 5 samples of TB-500 from ZLZ Peptide between 9 Oct 2025 and 13 May 2026. Test scores average below 4 or some scores below 3, and at least 2 tests, warrant a tentative Finnrick Rating of E (Bad).
Finnrick Rating™
Tentative Rating
ZLZ Peptide
TB-500
Tested 5 Samples
Last test 13 May 2026
Take Action
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 TB-500 tests from top-rated vendors:
All TB-500 tests from ZLZ Peptide
Samples are tested in commercial labs
Tests Count
5
Scores
AVGMINMAX
Last
13 May 2026
First
9 Oct 2025
| Quantity | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Variant | Test Score | Label | Tested | Difference | Purity | Batch ID | Container | Tested At | Sent By |
| 13 May 2026 | View | Thymosin Beta-4 | 2mg | 2.06mg | +3.0% | 99.30% | (no batch ID) | White Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 29 Dec 2025 | View | 5mg | 5.28mg | +5.6% | 99.95% | (no batch ID) | No Label / Silver Crimp / Blue Cap | Lab E | Public | ||
| 25 Nov 2025 | View | 2mg | 2.16mg | +8.0% | 85.85% | (no batch ID) | No Label / Silver Crimp / Blue Cap | Lab E | Public | ||
| 23 Oct 2025 | View | 5mg | 5.12mg | +2.4% | 91.03% | (no batch ID) | No Label / Silver Crimp / Blue Cap | Lab E | Public | ||
| 9 Oct 2025 | View | 2mg | 1.76mg | -12.0% | 97.25% | (no batch ID) | Pink Label / Silver Crimp / Blue Cap | Lab E | Public | ||