ZePeptide
TB-500
Finnrick tested 4 samples of TB-500 from ZePeptide between 4 Feb 2026 and 8 Jun 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
ZePeptide
TB-500
Tested 4 Samples
Last test 8 Jun 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 ZePeptide
Samples are tested in commercial labs
Tests Count
4
Scores
AVGMINMAX
Last
8 Jun 2026
First
4 Feb 2026
| Quantity | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Variant | Test Score | Label | Tested | Difference | Purity | Batch ID | Container | Tested At | Sent By |
| 8 Jun 2026 | View | 10mg | ⚠️ Sample does not contain TB-500 | (no batch ID) | No label / Silver crimp / White cap | Lab G | Public | ||||
| 28 Apr 2026 | View | 5mg | 5.33mg | +6.6% | 99.90% | (no batch ID) | No Label / Silver Crimp / Red Cap | Lab E | Public | ||
| 28 Apr 2026 | View | Thymosin Beta-4 | 5mg | 4.66mg | -6.8% | 99.90% | (no batch ID) | No Label / Silver Crimp / White Cap | Lab E | Public | |
| 4 Feb 2026 | View | Fragment 17-23 | 10mg | 10.1mg | +1.0% | 99.90% | (no batch ID) | No Label / Silver Crimp / Yellow Cap | Lab E | Public | |