Tesamorelin
We've tested 347 samples of Tesamorelin sourced from 39 vendors between 7 May 2025 and 3 Apr 2026. Purity typically ranges from 76.42% to 99.95% (5th-95th percentile), and quantity typically diverges by up to +/-93% vs advertised value (95th percentile).
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Vendors
| Tests | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Vendor | Rating | Count | Avg | Min | Max | Oldest | Most Recent | ||
 | 3 | 9 Oct 2025 | 26 Jan 2026 | ||||||
 | 11 | 30 Jan 2026 | 20 Feb 2026 | ||||||
| 3 | 4 Nov 2025 | 18 Feb 2026 | ||||||
 | 5 | 14 May 2025 | 4 Feb 2026 | ||||||
| 7 | 25 Nov 2025 | 12 Mar 2026 | ||||||
| 6 | 17 Nov 2025 | 12 Mar 2026 | ||||||
| 6 | 17 Jul 2025 | 11 Feb 2026 | ||||||
| 6 | 11 Aug 2025 | 6 Mar 2026 | ||||||
| 8 | 25 Nov 2025 | 12 Mar 2026 | ||||||
| 11 | 24 Jul 2025 | 4 Mar 2026 | ||||||
 | 7 | 13 Jun 2025 | 15 Jan 2026 | ||||||
| 8 | 4 Nov 2025 | 20 Feb 2026 | ||||||
| 9 | 9 Sep 2025 | 25 Mar 2026 | ||||||
 | 22 | 29 Jun 2025 | 18 Mar 2026 | ||||||
| 12 | 9 Sep 2025 | 18 Mar 2026 | ||||||
| 6 | 4 Nov 2025 | 19 Feb 2026 | ||||||
| 11 | 4 Aug 2025 | 20 Feb 2026 | ||||||
 | 12 | 27 Jun 2025 | 2 Mar 2026 | ||||||
| 9 | 9 Sep 2025 | 6 Mar 2026 | ||||||
| 6 | 23 Oct 2025 | 7 Mar 2026 | ||||||
| 7 | 13 Jun 2025 | 2 Mar 2026 | ||||||
| 31 | 4 Aug 2025 | 10 Mar 2026 | ||||||
| 15 | 17 Nov 2025 | 25 Mar 2026 | ||||||
| 8 | 21 Oct 2025 | 6 Mar 2026 | ||||||
 | 13 | 10 Aug 2025 | 12 Mar 2026 | ||||||
 | 19 | 29 Jun 2025 | 18 Mar 2026 | ||||||
 | 8 | 11 Aug 2025 | 26 Feb 2026 | ||||||
| 7 | 27 Jun 2025 | 7 Mar 2026 | ||||||
| 7 | 24 Jul 2025 | 25 Mar 2026 | ||||||
| 6 | 5 Aug 2025 | 20 Feb 2026 | ||||||
 | 4 | 7 May 2025 | 21 May 2025 | ||||||
 | 2 | 9 Oct 2025 | 20 Feb 2026 | ||||||
| 4 | 31 Aug 2025 | 7 Mar 2026 | ||||||
| 21 | 9 Jun 2025 | 15 Jan 2026 | ||||||
| 22 | 11 Aug 2025 | 4 Mar 2026 | ||||||
| 1 | 24 Jul 2025 | 24 Jul 2025 | ||||||
| 1 | 27 Jun 2025 | 27 Jun 2025 | ||||||
| 1 | 29 Jun 2025 | 29 Jun 2025 | ||||||
| 1 | 29 Jun 2025 | 29 Jun 2025 | ||||||
Most recent Tesamorelin tests
Samples are tested in commercial labs
| Quantity | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Vendor | Certificate | Test Score | Label | Batch | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 25 Mar 2026 | Uther | View | 20mg | (no batch claim) | 20.6mg | +3.0% | 99.70% | low | TE20-0303 | No Label / Blue Crimp / Green Cap | Lab G | Public | |
| 25 Mar 2026 | Yiwu Aozuo Trading Co | View | 5mg | (no batch claim) | 6.5mg | +30.0% | 99.80% | n/a | 1/2/2026 | No Label / Silver Crimp / White Cap | Lab G | Public | |
| 25 Mar 2026 | LiliPeptide | View | 5mg | (no batch claim) | 6.3mg | +26.0% | 99.80% | n/a | 2/25/2026 | No Label / Silver Crimp / White Cap | Lab G | Public | |
| 20 Mar 2026 | Uther | View | 20mg | (no batch claim) | 23.7mg | +18.5% | 99.80% | n/a | TE20-0303 | No Label / Blue Crimp / Green Cap | Lab G | Public | |
| 18 Mar 2026 | Nexaph | View | 10mg | 11.2mg | 11mg | -1.9% | 99.40% | n/a | TES1011262025-14 | White Label / Silver Crimp / Clear Blue Cap | Lab E | Public | |
| 18 Mar 2026 | Qing Li Peptide | View | 10mg | (no batch claim) | 8.84mg | -11.6% | 98.50% | n/a | October 9, 2027 | White Label / Silver Crimp / Yellow Cap | Lab E | Public | |
| 18 Mar 2026 | Reta-Peptide | View | 5mg | (no batch claim) | 5.31mg | +6.2% | 99.90% | n/a | jan 18, 2026 | No Label / Silver Crimp / White Cap | Lab E | Public | |
Corrections
- 17 Nov 2025: Peptide Sciences
- Test results for sample pst3r4y were published from 31 Oct to 17 Nov 2025, but did not belong to Peptide Sciences: the sample was misidentified, and re-attributed to the correct vendor.