Semaglutide(GLP-1 agonist)
We've tested 338 samples of Semaglutide sourced from 57 vendors between 17 Dec 2024 and 1 Jul 2026. Purity typically ranges from 98.19% to 99.99% (5th-95th percentile), and quantity typically diverges by up to +/-38% vs advertised value (95th percentile).
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Vendors
| Tests | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Vendor | Rating | Count | Avg | Min | Max | Oldest | Most Recent | ||
 | 9 | 17 Dec 2024 | 20 Mar 2025 | ||||||
 | 6 | 29 Jun 2025 | 18 Mar 2026 | ||||||
 | 8 | 17 Dec 2024 | 6 May 2025 | ||||||
 | 7 | 22 Apr 2025 | 5 May 2025 | ||||||
 | 7 | 14 Jan 2025 | 20 Mar 2025 | ||||||
 | 10 | 17 Dec 2024 | 20 Mar 2025 | ||||||
 | 10 | 9 Jul 2025 | 1 Jun 2026 | ||||||
| 3 | 5 Dec 2025 | 6 Feb 2026 | ||||||
 | 2 | 14 Jan 2025 | 23 Jan 2025 | ||||||
| 2 | 28 Apr 2026 | 28 Apr 2026 | ||||||
 | 4 | 16 May 2025 | 22 Jul 2025 | ||||||
| 4 | 1 Sep 2025 | 2 Mar 2026 | ||||||
| 2 | 30 Dec 2025 | 30 Dec 2025 | ||||||
 | 4 | 6 May 2025 | 21 May 2025 | ||||||
 | 4 | 13 Feb 2025 | 19 Feb 2025 | ||||||
 | 4 | 14 Jun 2025 | 5 Aug 2025 | ||||||
 | 2 | 14 Feb 2025 | 19 Feb 2025 | ||||||
| 3 | 9 Oct 2025 | 29 Dec 2025 | ||||||
 | 4 | 27 Feb 2025 | 20 Mar 2025 | ||||||
 | 3 | 16 May 2025 | 22 Jul 2025 | ||||||
| 5 | 21 Oct 2025 | 28 Apr 2026 | ||||||
 | 4 | 6 May 2025 | 6 May 2025 | ||||||
 | 5 | 17 Dec 2024 | 19 Feb 2025 | ||||||
 | 4 | 25 Apr 2025 | 6 May 2025 | ||||||
 | 5 | 28 Mar 2025 | 24 Oct 2025 | ||||||
 | 6 | 16 Mar 2025 | 25 Mar 2025 | ||||||
 | 7 | 16 Mar 2025 | 3 Aug 2025 | ||||||
 | 14 | 14 Apr 2025 | 10 Sep 2025 | ||||||
 | 5 | 16 Jul 2025 | 15 Jan 2026 | ||||||
 | 6 | 22 Apr 2025 | 7 May 2025 | ||||||
 | 15 | 17 Dec 2024 | 1 Mar 2026 | ||||||
 | 5 | 28 Mar 2025 | 22 Jul 2025 | ||||||
 | 4 | 7 May 2025 | 21 May 2025 | ||||||
 | 4 | 29 Jun 2025 | 15 Jan 2026 | ||||||
 | 5 | 24 Apr 2025 | 21 May 2025 | ||||||
| 3 | 29 Jun 2025 | 25 Nov 2025 | ||||||
 | 4 | 7 May 2025 | 16 May 2025 | ||||||
 | 16 | 17 Dec 2024 | 12 Aug 2025 | ||||||
 | 9 | 14 Jan 2025 | 6 May 2025 | ||||||
 | 9 | 25 Apr 2025 | 5 Aug 2025 | ||||||
 | 15 | 11 Jun 2025 | 6 Mar 2026 | ||||||
| 6 | 14 Jun 2025 | 5 Aug 2025 | ||||||
 | 2 | 7 May 2025 | 7 May 2025 | ||||||
| 5 | 1 Jan 2026 | 12 Jun 2026 | ||||||
 | 4 | 13 Feb 2025 | 19 Feb 2025 | ||||||
| 4 | 4 Sep 2025 | 17 Dec 2025 | ||||||
 | 9 | 17 Dec 2024 | 30 Apr 2025 | ||||||
 | 4 | 16 Mar 2025 | 25 Mar 2025 | ||||||
| 4 | 6 Jan 2026 | 25 Mar 2026 | ||||||
 | 4 | 27 Feb 2025 | 20 Mar 2025 | ||||||
| 10 | 11 Jun 2025 | 13 May 2026 | ||||||
 | 6 | 28 Feb 2025 | 28 Mar 2025 | ||||||
 | 6 | 5 Aug 2025 | 29 Jan 2026 | ||||||
| 4 | 25 Sep 2025 | 4 Mar 2026 | ||||||
| 10 | 29 Jun 2025 | 3 Mar 2026 | ||||||
| 5 | 24 Oct 2025 | 22 Jun 2026 | ||||||
Most recent Semaglutide tests
Samples are tested in commercial labs
| Quantity | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Vendor | Certificate | Test Score | Label | Tested | Difference | Purity | Batch ID | Container | Tested At | Sent By |
| 22 Jun 2026 | Wuhan Wansheng Biotechnology | View | 20mg | 20.7mg | +3.5% | 99.90% | (no batch ID) | White label / Copper crimp / Clear cap | Lab E | Public | |
| 12 Jun 2026 | HXNet | View | 5mg | 5.5mg | +10.0% | 99.80% | May 700-5 | Silver label / Silver crimp / Green cap | Lab G | Public | |
| 2 Jun 2026 | HXNet | View | 15mg | 16.4mg | +9.3% | 99.70% | 700-15 | No label / Silver crimp / Blue cap | Lab E | Public | |
| 1 Jun 2026 | HK Peptides | View | 5mg | 5.05mg | +1.0% | 99.90% | (no batch ID) | No label / Silver crimp / Green cap | Lab E | Public | |
| 13 May 2026 | ZLZ Peptide | View | 10mg | 5.81mg | -41.9% | 99.90% | (no batch ID) | White Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 6 May 2026 | ZLZ Peptide | View | 10mg | 9.35mg | -6.5% | 99.90% | (no batch ID) | No Label / Silver Crimp / White Cap | Lab E | Public | |
| 5 May 2026 | HK Peptides | View | 10mg | 4.79mg | -52.1% | 99.90% | 11/2025 | No Label / Silver Crimp / White Cap | Lab E | Public | |
Corrections
- 25 Mar 2026: Zenith Jove Peptide ZJ
- Sample ef8mddf (Tirzepatide) and ryusy8h (Semaglutide) were reported by the submitter as mixed up, resulting in the incorrect test being run. However, Finnrick believes that such a mistake could have happened at the time of actually using the samples, because the vials are unlabeled, and therefore will not re-run the tests or retract the results, beyond the present note.
- 17 Nov 2025: Peptide Sciences
- Test results for sample cjkyg7x 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.
- 10 Mar 2025: Peptide Crafters
- Lab C tests 10 Mar 2025: error for Batch Qty on test result SPL-0511-S01, corrected with new result from Lab