
Oupeptide
TB-500
Finnrick tested 5 samples of TB-500 from Oupeptide between 4 Aug 2025 and 20 Jul 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™
Oupeptide
TB-500
Tested 5 Samples
Last test 20 Jul 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 Oupeptide
Samples are tested in commercial labs
Tests Count
5
Scores
AVGMINMAX
Last
20 Jul 2026
First
4 Aug 2025
| Quantity | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Certificate | Variant | Test Score | Label | Tested | Difference | Purity | Batch ID | Container | Tested At | Sent By |
| 20 Jul 2026 | View | 5mg | ⚠️ Sample does not contain TB-500 | 5-7-2026 | No label / Silver crimp / Clear Pink cap | Lab G | Public | ||||
| 27 May 2026 | View | 10mg | 13.5mg | +35.0% | 96.40% | 03182026 | No label / Silver crimp / White cap | Lab E | Public | ||
| 29 Jan 2026 | View | 10mg | 9.82mg | -1.8% | 99.90% | (no batch ID) | Silver Label / Silver Crimp / Red Cap | Lab E | Public | ||
| 19 Jan 2026 | View | Thymosin Beta-4 | 10mg | 12mg | +20.0% | 79.05% | (no batch ID) | White Label / Silver Crimp / White Cap | Lab E | Public | |
| 4 Aug 2025 | View | 10mg | 8.01mg | -19.9% | 91.59% | (no batch ID) | No Label / Silver Crimp / White Cap | Lab E | Public | ||