Vendor rankings
The vendors, scored on what we measured.
Scores run from zero to ten and come from blind retail purchases and submitted samples. The ratings range shows the spread from a vendor's best product to its worst. No vendor can pay to move up this list.
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| Tests | ||||||||
|---|---|---|---|---|---|---|---|---|
| Vendor name | Ratings range | Products | Count | Avg | Min | Max | Oldest | Most Recent |
| IQON | AA | 15 | 737 | 9.4 | 9.3 | 9.6 | 11 Mar 2026 | 13 Jul 2026 |
| Paradigm Peptide | AA | 5 | 66 | 9.3 | 9.0 | 9.9 | 14 Jan 2025 | 17 Jun 2026 |
| Huayi Biotechnology | AA | 3 | 70 | 9.1 | 9.0 | 9.2 | 09 Jun 2025 | 06 Jun 2026 |
| Astro Peptides | AtoB | 12 | 245 | 8.5 | 6.7 | 9.8 | 04 Nov 2025 | 11 May 2026 |
| Bulk Peptide Supply | AtoB | 9 | 107 | 8.4 | 7.2 | 9.7 | 22 Apr 2025 | 11 May 2026 |
| HK Peptides | AtoC | 5 | 71 | 8.1 | 6.1 | 9.6 | 16 Dec 2025 | 08 Jun 2026 |
| Qing Li Peptide | AtoC | 12 | 196 | 7.7 | 6.1 | 9.6 | 01 Sep 2025 | 06 Jun 2026 |
| Peptide Crafters | AtoC | 13 | 216 | 7.6 | 5.9 | 9.6 | 01 Sep 2025 | 02 Jun 2026 |
| Limitless Life | AtoD | 14 | 229 | 7.3 | 4.2 | 9.8 | 11 Jun 2025 | 16 Jun 2026 |
| Shanghai ERP Peptide Biotechnology | AtoC | 14 | 236 | 7.2 | 5.1 | 8.8 | 22 Apr 2025 | 28 May 2026 |
| Nantong Guangyuan Chemical GYC | AtoC | 5 | 102 | 7.1 | 5.8 | 8.4 | 22 Nov 2025 | 05 May 2026 |
| Lisa Biopeptide | AtoD | 11 | 211 | 6.9 | 4.9 | 9.1 | 06 May 2025 | 02 Mar 2026 |
| Peptide Sciences | AtoC | 11 | 215 | 6.8 | 5.2 | 9.3 | 04 Nov 2025 | 08 Jun 2026 |
| Lejian Biotech Peptide | AtoE | 10 | 151 | 6.5 | 3.3 | 9.0 | 30 Oct 2025 | 17 Jun 2026 |
| Yiwu Aozuo Trading Co | AtoE | 9 | 162 | 6.4 | 3.1 | 8.4 | 04 Nov 2025 | 19 May 2026 |
| Peptide Partners | AtoE | 14 | 282 | 6.3 | 2.9 | 8.4 | 14 Jan 2025 | 02 Mar 2026 |
| Inno Peptides | AtoD | 8 | 111 | 6.3 | 4.2 | 9.1 | 14 Jan 2025 | 02 Jun 2026 |
| Reta-Peptide | AtoD | 10 | 147 | 6.2 | 3.7 | 8.8 | 06 May 2025 | 20 May 2026 |
| Marvel Pep | AtoE | 5 | 53 | 6.1 | 2.9 | 8.2 | 17 Dec 2024 | 20 Feb 2026 |
| Amino Amigos | AtoD | 19 | 273 | 6.1 | 3.6 | 8.0 | 01 Sep 2025 | 17 Jun 2026 |
| Andy Peps Studio | AtoE | 8 | 134 | 5.9 | 2.8 | 8.1 | 30 Oct 2025 | 30 Apr 2026 |
| Zhengzhou Lan Yun Cosmetic Trading | AtoE | 14 | 255 | 5.7 | 2.8 | 9.1 | 01 Sep 2025 | 17 Jun 2026 |
| Saiyan Med | AtoE | 8 | 133 | 5.3 | 3.4 | 8.2 | 09 Jun 2025 | 30 Apr 2026 |
| Xianhong Tong XHT Peptides | BtoD | 3 | 37 | 6.3 | 4.7 | 7.6 | 11 Jun 2025 | 11 May 2026 |
| Nuscience Peptides | BtoD | 4 | 83 | 5.3 | 4.2 | 7.2 | 17 Dec 2024 | 02 Feb 2026 |
| Planet Peptide | BtoD | 3 | 46 | 5.2 | 3.6 | 7.2 | 29 Jun 2025 | 02 Mar 2026 |
| Amino Lair | BtoE | 12 | 138 | 3.8 | 1.7 | 7.8 | 22 Nov 2025 | 11 May 2026 |
| Wuhan Wansheng Biotechnology | BtoE | 13 | 272 | 2.8 | 0.0 | 7.2 | 16 Dec 2025 | 19 May 2026 |
| Paramount Peptides | BtoE | 14 | 189 | 1.9 | 0.0 | 6.6 | 30 Oct 2025 | 02 Mar 2026 |
| Skye Peptides | CtoD | 4 | 61 | 5.5 | 4.8 | 6.1 | 11 Jun 2025 | 06 Jun 2026 |
| SRY Labs | CtoE | 8 | 146 | 5.2 | 3.1 | 6.1 | 22 Nov 2025 | 16 Jun 2026 |
| HXNet | CtoE | 7 | 106 | 4.2 | 0.0 | 5.8 | 11 Jun 2025 | 30 Apr 2026 |
| Noble Dragons | CtoE | 6 | 97 | 4.2 | 1.0 | 6.0 | 11 Jun 2025 | 30 Apr 2026 |
| Uther | CtoE | 17 | 289 | 2.3 | 0.0 | 6.3 | 22 Apr 2025 | 28 May 2026 |
| Aavant Research | CtoE | 14 | 252 | 2.1 | 0.0 | 6.2 | 22 Nov 2025 | 11 May 2026 |
| Polaris Peptides | CtoE | 5 | 82 | 1.8 | 0.0 | 5.9 | 14 Jan 2025 | 02 Feb 2026 |
| Guangzhou Jeep Biotechnology JEEP | CtoE | 5 | 98 | 1.8 | 0.0 | 5.4 | 16 Dec 2025 | 30 Apr 2026 |
| ZLZ Peptide | CtoE | 13 | 221 | 1.3 | 0.0 | 5.1 | 20 Jun 2025 | 18 Mar 2026 |
| Yimei | DtoE | 3 | 50 | 3.2 | 2.4 | 3.8 | 04 Nov 2025 | 30 Apr 2026 |
| Golden Eagle | DtoE | 5 | 103 | 1.5 | 0.0 | 4.4 | 14 Jan 2025 | 17 Jun 2026 |
| PurePEPS | EE | 5 | 101 | 0.1 | 0.0 | 0.2 | 17 Dec 2024 | 19 May 2026 |