TB-500
We've tested 213 samples of TB-500 sourced from 34 vendors between 16 May 2025 and 21 Aug 2026. Purity typically ranges from 87.23% to 99.90% (5th-95th percentile), and quantity typically diverges by up to +/-100% vs advertised value (95th percentile).
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Vendors
| Tests | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Vendor | Rating | Count | Avg | Min | Max | Oldest | Most Recent | ||
 | 2 | 9 Jan 2026 | 7 Mar 2026 | ||||||
 | 2 | 6 May 2026 | 6 May 2026 | ||||||
 | 5 | 10 Jul 2025 | 30 Apr 2026 | ||||||
 | 4 | 29 Dec 2025 | 9 Aug 2026 | ||||||
| 4 | 23 Oct 2025 | 10 Mar 2026 | ||||||
| 4 | 23 Oct 2025 | 19 Mar 2026 | ||||||
| 6 | 21 Oct 2025 | 3 Aug 2026 | ||||||
| 5 | 17 Nov 2025 | 6 Jun 2026 | ||||||
| 4 | 25 Nov 2025 | 17 Jul 2026 | ||||||
| 5 | 9 Sep 2025 | 6 May 2026 | ||||||
| 4 | 2 Mar 2026 | 8 Jun 2026 | ||||||
| 14 | 9 Sep 2025 | 24 Jun 2026 | ||||||
 | 13 | 30 Jan 2026 | 5 Aug 2026 | ||||||
| 4 | 4 Mar 2026 | 2 Aug 2026 | ||||||
| 4 | 27 Oct 2025 | 17 Jun 2026 | ||||||
| 4 | 9 Sep 2025 | 7 Mar 2026 | ||||||
| 6 | 9 Oct 2025 | 15 Jul 2026 | ||||||
 | 8 | 16 May 2025 | 30 Jan 2026 | ||||||
| 7 | 23 Apr 2026 | 9 Aug 2026 | ||||||
| 12 | 24 Jul 2025 | 20 Jul 2026 | ||||||
 | 5 | 4 Aug 2025 | 20 Jul 2026 | ||||||
| 6 | 23 Oct 2025 | 21 Aug 2026 | ||||||
 | 18 | 29 Jun 2025 | 27 May 2026 | ||||||
| 7 | 4 Feb 2026 | 13 Aug 2026 | ||||||
| 8 | 30 Dec 2025 | 13 Aug 2026 | ||||||
| 9 | 21 Oct 2025 | 12 Jun 2026 | ||||||
| 5 | 9 Oct 2025 | 13 Aug 2026 | ||||||
| 5 | 19 Jan 2026 | 1 Jul 2026 | ||||||
| 4 | 23 Oct 2025 | 17 Jul 2026 | ||||||
| 5 | 11 May 2026 | 9 Aug 2026 | ||||||
| 5 | 19 Jan 2026 | 22 Jul 2026 | ||||||
| 4 | 6 Dec 2025 | 17 Jun 2026 | ||||||
| 9 | 4 Aug 2025 | 23 Jun 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 | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 21 Aug 2026 | Yimei | View | 5mg | 5.7mg | +14.0% | 99.60% | n/a | (no batch ID) | (no data) | Lab G | Public | ||
| 20 Aug 2026 | Yimei | View | Endotoxins | 5mg | n/a | n/a | n/a | low | (no batch ID) | (no data) | Lab G | Public | |
| 13 Aug 2026 | ZePeptide | View | 10mg | ⚠️ Sample does not contain TB-500 | n/a | A | No label / Silver crimp / Clear Pink cap | Lab E | Public | ||||
| 13 Aug 2026 | Tianjin Ruiwang New Material Technology Co | View | Fragment 17-23 | 5mg | 4.62mg | -7.6% | 99.40% | n/a | March 4, 2026 | No label / Silver crimp / White cap | Lab E | Public | |
| 13 Aug 2026 | Lipeptides | View | 10mg | 12.8mg | +28.0% | 99.50% | n/a | Mar 11, 2026 | No label, Silver crimp, Red cap | Lab G | Public | ||
| 9 Aug 2026 | Welon Peptide Solutions | View | 10mg | 11.4mg | +14.0% | 99.60% | n/a | 2602280010 | No label / Silver crimp / Yellow cap | Lab G | Public | ||
| 9 Aug 2026 | ZePeptide | View | Thymosin Beta-4 | 10mg | 11.7mg | +17.0% | 99.60% | n/a | BT10/260402 | No label / Silver crimp / Yellow cap | Lab G | Public | |