Semaglutide(GLP-1 agonist)
We've tested 315 samples of Semaglutide sourced from 52 vendors between 17 Dec 2024 and 15 May 2026. Purity typically ranges from 98.34% 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 | ||||||
 | 9 | 9 Jul 2025 | 5 May 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 | ||||||
| 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 | ||||||
 | 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 | 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 | ||||||
| 10 | 29 Jun 2025 | 3 Mar 2026 | ||||||
Most recent Semaglutide tests
Samples are tested in commercial labs
| Quantity | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Vendor | Certificate | Test Score | Label | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 13 May 2026 | ZLZ Peptide | View | 10mg | 5.81mg | -41.9% | 99.90% | n/a | (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% | n/a | (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% | n/a | 11/2025 | No Label / Silver Crimp / White Cap | Lab E | Public | |
| 28 Apr 2026 | Aminos Research | View | 5.63mg | 5.37mg | -4.6% | 99.90% | below LOQ | GLPS-0003 | No Label / Copper Crimp / Clear Cap | Lab E | Vendor | |
| 28 Apr 2026 | Aminos Research | View | 5.63mg | 5.5mg | -2.3% | 99.20% | below LOQ | GLPS-0003 | No Label / Copper Crimp / Clear Cap | Lab E | Vendor | |
| 28 Apr 2026 | Tianjin Ruiwang New Material Technology Co | View | 30mg | 29.4mg | -2.0% | 99.90% | n/a | (no batch ID) | No Label / Silver Crimp / Yellow Cap | Lab E | Public | |
| 18 Mar 2026 | Bulk Peptide Supply | View | 10mg | 10.1mg | +1.0% | 99.90% | n/a | (no batch ID) | Silver Label / Silver Crimp / Blue 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
Launch with Finnrick
Some of the samples listed on this page were submitted by their vendor, as part of the Launch with Finnrick vendor support program.
The program is designed to help vendors get listed on the Finnrick web site while protecting the integrity of our rating system.
The vendor submitted four samples per product, two of which were tested by Finnrick for identity, purity and quantity according to our usual process. The vials were anonymized before being sent to the testing lab.