Tirzepatide(GLP-1 and GIP antagonist)
We've tested 192 samples of Tirzepatide sourced from 55 vendors between 17 Dec 2024 and 11 Jun 2025. Purity varies from 96.46% to 899.72%, and quantity can diverge by up to +/-84% vs advertised value.
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Vendors
| Tests | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Vendor | Rating | Count | Avg | Min | Max | Oldest | Most Recent | ||
 | Polaris Peptides | 13 | 17 Dec 2024 | 7 May 2025 | |||||
 | Simple Peptide | 4 | 25 Apr 2025 | 7 May 2025 | |||||
 | Atomik Labz | 4 | 6 May 2025 | 7 May 2025 | |||||
 | Nuscience Peptides | 2 | 7 May 2025 | 7 May 2025 | |||||
 | Skye Peptides | 9 | 17 Dec 2024 | 21 May 2025 | |||||
 | Verified Peptides | 4 | 13 Feb 2025 | 19 Feb 2025 | |||||
 | Pharma Grade Peptides | 2 | 21 May 2025 | 21 May 2025 | |||||
 | Coastal Peptides | 5 | 27 Feb 2025 | 20 Mar 2025 | |||||
 | PurePeptides | 4 | 27 Feb 2025 | 20 Mar 2025 | |||||
 | Pure Rawz | 4 | 7 May 2025 | 21 May 2025 | |||||
 | Eternal Peptides | 4 | 7 May 2025 | 21 May 2025 | |||||
 | Planet Peptide | 12 | 17 Dec 2024 | 21 May 2025 | |||||
 | SRY Labs | 3 | 15 May 2025 | 11 Jun 2025 | |||||
 | Forever Young Pharmacy | 3 | 2 Apr 2025 | 2 Apr 2025 | |||||
 | Alpha-Gen | 5 | 24 Apr 2025 | 21 May 2025 | |||||
 | Oasis Peptides | 6 | 14 Jan 2025 | 13 Feb 2025 | |||||
 | Peptide Sciences | 9 | 28 Mar 2025 | 7 May 2025 | |||||
 | Loti Labs | 10 | 16 Mar 2025 | 7 May 2025 | |||||
 | NextechLabs | 6 | 14 Jan 2025 | 20 Mar 2025 | |||||
 | Shanghai OuDaXin New Material Technology Center | 3 | 3 Jun 2025 | 11 Jun 2025 | |||||
 | Peptide-S | 3 | 9 Jun 2025 | 11 Jun 2025 | |||||
 | Peptide Crafters | 5 | 17 Dec 2024 | 20 Mar 2025 | |||||
 | Amino Asylum | 2 | 14 Feb 2025 | 19 Feb 2025 | |||||
 | Royal Peptides | 6 | 16 Mar 2025 | 25 Mar 2025 | |||||
 | Tydes | 10 | 17 Dec 2024 | 30 Apr 2025 | |||||
 | Zztai Peptide | 3 | 9 Jun 2025 | 9 Jun 2025 | |||||
 | Paramount Peptides | 9 | 14 Jan 2025 | 7 May 2025 | |||||
 | Suaway Lab Research | 4 | 28 Mar 2025 | 16 May 2025 | |||||
 | Amino Amigos | 7 | 14 Jan 2025 | 20 Mar 2025 | |||||
 | Peptide Gurus | 6 | 16 Mar 2025 | 25 Mar 2025 | |||||
 | TSC Top Supplements China | 1 | 3 Jun 2025 | 3 Jun 2025 | |||||
 | Oupeptide | 1 | 3 Jun 2025 | 3 Jun 2025 | |||||
| Zhejiang Yichenkang Biotechnology | 1 | 11 Jun 2025 | 11 Jun 2025 | |||||
 | Hunan Ruiwang Technology Center | 1 | 3 Jun 2025 | 3 Jun 2025 | |||||
Most recent Tirzepatide 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 |
| 11 Jun 2025 | SRY Labs | View | 30mg | 30.100mg | +0.3% | 99.85% | (no batch ID) | No Label / Silver Crimp / Yellow Cap | Lab E | Public | |
| 11 Jun 2025 | Shanghai OuDaXin New Material Technology Center | View | 20mg | 16.800mg | -16.0% | 99.64% | (no batch ID) | Silver Label / Silver Crimp / Grey Cap | Lab E | Public | |
| 11 Jun 2025 | Peptide-S | View | 5mg | 4.840mg | -3.2% | 99.85% | (no batch ID) | No Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 11 Jun 2025 | Peptide-S | View | 10mg | 15.600mg | +56.0% | 99.93% | (no batch ID) | No Label / Silver Crimp / Yellow Cap | Lab E | Public | |
| 11 Jun 2025 | Shanghai OuDaXin New Material Technology Center | View | 15mg | 14.700mg | -2.0% | 99.84% | (no batch ID) | Silver Label / Silver Crimp / Blue Cap | Lab E | Public | |
| 11 Jun 2025 | Zhejiang Yichenkang Biotechnology | View | 5mg | 4.210mg | -15.8% | 99.72% | (no batch ID) | (no data) | Lab E | Finnrick | |
| 9 Jun 2025 | Zztai Peptide | View | 5mg | 4.590mg | -8.2% | 99.41% | (no batch ID) | No Label / Silver Crimp / Clear Blue Cap | Lab E | Public | |
Corrections
- 17 Apr 2025: NextechLabs
- Lab A test 27 Feb 2025, lab C test 28 Feb 2025, lab B test 30 Mar 2025: updated batch claim quantity, label claim was clear, erroneously listed 10mg.