TB-500
We've tested 173 samples of TB-500 sourced from 29 vendors between 16 May 2025 and 17 Jun 2026. Purity typically ranges from 85.85% 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 | ||
 | 11 | 30 Jan 2026 | 4 Mar 2026 | ||||||
 | 2 | 9 Jan 2026 | 7 Mar 2026 | ||||||
 | 2 | 6 May 2026 | 6 May 2026 | ||||||
 | 5 | 10 Jul 2025 | 30 Apr 2026 | ||||||
| 4 | 23 Oct 2025 | 10 Mar 2026 | ||||||
| 4 | 23 Oct 2025 | 19 Mar 2026 | ||||||
| 5 | 17 Nov 2025 | 6 Jun 2026 | ||||||
| 5 | 9 Sep 2025 | 6 May 2026 | ||||||
| 4 | 2 Mar 2026 | 8 Jun 2026 | ||||||
| 5 | 21 Oct 2025 | 25 Mar 2026 | ||||||
| 13 | 9 Sep 2025 | 15 Jun 2026 | ||||||
| 4 | 19 Jan 2026 | 27 May 2026 | ||||||
| 5 | 23 Apr 2026 | 8 Jun 2026 | ||||||
| 4 | 27 Oct 2025 | 17 Jun 2026 | ||||||
| 4 | 9 Sep 2025 | 7 Mar 2026 | ||||||
 | 8 | 16 May 2025 | 30 Jan 2026 | ||||||
| 11 | 24 Jul 2025 | 15 Jun 2026 | ||||||
| 9 | 21 Oct 2025 | 12 Jun 2026 | ||||||
 | 18 | 29 Jun 2025 | 27 May 2026 | ||||||
| 7 | 30 Dec 2025 | 6 May 2026 | ||||||
| 5 | 9 Oct 2025 | 13 May 2026 | ||||||
| 4 | 9 Oct 2025 | 15 May 2026 | ||||||
| 4 | 19 Jan 2026 | 1 Jun 2026 | ||||||
 | 4 | 4 Aug 2025 | 27 May 2026 | ||||||
| 4 | 6 Dec 2025 | 17 Jun 2026 | ||||||
| 5 | 23 Oct 2025 | 7 Mar 2026 | ||||||
| 4 | 4 Feb 2026 | 8 Jun 2026 | ||||||
| 8 | 4 Aug 2025 | 25 Mar 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 | Batch ID | Container | Tested At | Sent By |
| 17 Jun 2026 | Huaian Hanyou Peptide | View | Thymosin Beta-4 | 5mg | 4.42mg | -11.6% | 96.10% | (no batch ID) | No label / Silver crimp / Clear Green cap | Lab E | Public | |
| 17 Jun 2026 | Shanghai Baoju | View | 10mg | 9.02mg | -9.8% | 97.50% | BT10041526 | Black label / Silver crimp / Clear Pink cap | Lab E | Public | ||
| 15 Jun 2026 | Reta-Peptide | View | 10mg | 9.71mg | -2.9% | 97.50% | Feb 1, 2026 | White label / Silver crimp / Clear Pink cap | Lab E | Public | ||
| 15 Jun 2026 | LiliPeptide | View | Thymosin Beta-4 | 10mg | 9.61mg | -3.9% | 99.40% | March 30, 2026 | No label / Silver crimp / Red cap | Lab E | Public | |
| 12 Jun 2026 | HK Peptides | View | 5mg | 4.73mg | -5.4% | 99.90% | 03/20/2026 | (no data) | Lab E | Public | ||
| 8 Jun 2026 | Zenith Jove Peptide ZJ | View | 10mg | 11.2mg | +12.0% | 99.70% | S656-cici | No label / Silver crimp / White cap | Lab G | Public | ||
| 8 Jun 2026 | Welon Peptide Solutions | View | 10mg | 6mg | -40.0% | 99.70% | (no batch ID) | No label / Silver crimp / Red cap | Lab G | Public | ||