TB-500
We've tested 50 samples of TB-500 sourced from 8 vendors between 16 May 2025 and 4 Mar 2026. Purity varies from 3.18% to 99.95%, and quantity can diverge by up to +/-104% vs advertised value.
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Vendors
| Tests | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Vendor | Rating | Count | Avg | Min | Max | Oldest | Most Recent | ||
 | Peptide Partners | 6 | 30 Jan 2026 | 18 Feb 2026 | |||||
| LiliPeptide | 6 | 9 Sep 2025 | 6 Feb 2026 | |||||
| ZLZ Peptide | 4 | 9 Oct 2025 | 29 Dec 2025 | |||||
 | SRY Labs | 8 | 16 May 2025 | 30 Jan 2026 | |||||
| Reta-Peptide | 5 | 24 Jul 2025 | 29 Jan 2026 | |||||
| Wuhan Wansheng Biotechnology | 5 | 4 Aug 2025 | 29 Jan 2026 | |||||
 | Qing Li Peptide | 13 | 29 Jun 2025 | 4 Feb 2026 | |||||
| Shanghai Sigma Audley SSA | 3 | 24 Jul 2025 | 9 Sep 2025 | |||||
Most recent TB-500 tests
Samples are tested in commercial labs
| Quantity | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Vendor | Certificate | Variant | Test Score | Label | Tested | Difference | Purity | Batch ID | Container | Tested At | Sent By |
| 18 Feb 2026 | Peptide Partners | View | Thymosin Beta-4 | 10mg | 10.9mg | +9.0% | 98.80% | TB202601 | White Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 18 Feb 2026 | Peptide Partners | View | Thymosin Beta-4 | 10mg | 9.54mg | -4.6% | 99.90% | TB202601 | White Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 10 Feb 2026 | Peptide Partners | View | Thymosin Beta-4 | 10mg | 10.6mg | +6.0% | 99.80% | TB202601 | White Label / Silver Crimp / Blue Cap | Lab G | Public | |
| 10 Feb 2026 | Peptide Partners | View | Thymosin Beta-4 | 10mg | 9.6mg | -4.0% | 99.80% | TB202601 | White Label / Silver Crimp / Blue Cap | Lab G | Public | |
| 6 Feb 2026 | LiliPeptide | View | 10mg | 11.1mg | +11.0% | 99.90% | (no batch ID) | No Label / Silver Crimp / White Cap | Lab E | Public | ||
| 4 Feb 2026 | Qing Li Peptide | View | 10mg | 9.28mg | -7.2% | 96.87% | (no batch ID) | No Label / Silver Crimp / Black Cap | Lab E | Public | ||
| 30 Jan 2026 | Peptide Partners | View | Thymosin Beta-4 | 10mg | 10.71mg | +7.1% | 98.16% | TB202601 | No Label / Silver Crimp / Blue Cap | Lab A | Vendor | |