TB-500
We've tested 42 samples of TB-500 sourced from 7 vendors between 16 May 2025 and 4 Feb 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 | ||
 | 5 | 9 Sep 2025 | 15 Jan 2026 | ||||||
 | 8 | 16 May 2025 | 30 Jan 2026 | ||||||
 | 12 | 29 Jun 2025 | 15 Jan 2026 | ||||||
| 4 | 9 Oct 2025 | 29 Dec 2025 | ||||||
| 5 | 24 Jul 2025 | 29 Jan 2026 | ||||||
| 5 | 4 Aug 2025 | 29 Jan 2026 | ||||||
| 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 | Batch | Tested | Difference | Purity | Batch ID | Container | Tested At | Sent By |
| 30 Jan 2026 | SRY Labs | View | Thymosin Beta-4 | 10mg | 10.6mg | 10.3mg | -2.6% | 98.04% | H20250828 | No Label / Silver Crimp / White Cap | Lab E | Public | |
| 29 Jan 2026 | Reta-Peptide | View | Thymosin Beta-4 | 10mg | (no batch claim) | 9.21mg | -7.9% | 99.90% | NOV 8, 2025 | White Label / Silver Crimp / Clear Pink Cap | Lab E | Public | |
| 29 Jan 2026 | Wuhan Wansheng Biotechnology | View | 1mg | (no batch claim) | 2.04mg | +104.0% | 93.65% | (no batch ID) | No Label / Silver Crimp / Black Cap | Lab E | Public | ||
| 15 Jan 2026 | LiliPeptide | View | 5mg | (no batch claim) | 4.98mg | -0.4% | 99.56% | November 5 2025 | No Label / Silver Crimp / White Cap | Lab E | Public | ||
| 15 Jan 2026 | Qing Li Peptide | View | 10mg | (no batch claim) | 10.2mg | +2.0% | 97.41% | Nov 12, 2025 | No Label / Silver Crimp / Clear Green Cap | Lab E | Public | ||
| 9 Jan 2026 | Qing Li Peptide | View | Thymosin Beta-4 | 10mg | (no batch claim) | 8.92mg | -10.8% | 99.95% | TB10-10/25 | No Label / Silver Crimp / Clear Pink Cap | Lab E | Public | |
| 9 Jan 2026 | Qing Li Peptide | View | Thymosin Beta-4 | 10mg | (no batch claim) | 11.1mg | +11.0% | 99.51% | (no batch ID) | No Label / Silver Crimp / Clear Green Cap | Lab E | Public | |