Letrozole
57
Vendors
161
Samples
6.3
Average score
23 May 2026
Latest assay
| № | Vendor | Rating | Samples | Avg | Min | Max | Most recent |
|---|---|---|---|---|---|---|---|
| 1 | Tianjin Finder Chemical TFC | A | 7 | 10.0 | 9.9 | 10.0 | 16 Apr 2026 |
| 2 | Kerui Peptides | A | 4 | 10.0 | 9.9 | 10.0 | 10 Jul 2026 |
| 3 | Chinese Peptide Company | A | 4 | 10.0 | 10.0 | 10.0 | 10 Jul 2026 |
| 4 | Shanghai ERP Biotechnology | A | 3 | 10.0 | 9.9 | 10.0 | 7 May 2026 |
| 5 | Sangon Bio | A | 3 | 10.0 | 9.9 | 10.0 | 10 May 2026 |
| 6 | Bachem | A | 3 | 10.0 | 9.9 | 10.0 | 12 Jun 2026 |
| 7 | Hubei Jianxiang | A | 3 | 10.0 | 9.9 | 10.0 | 1 Jul 2026 |
| 8 | Shanghai Wibson Biotechnology | A | 3 | 10.0 | 9.9 | 10.0 | 24 Jun 2026 |
| 9 | QYAOBIO | A | 2 | 10.0 | 10.0 | 10.0 | 3 Jun 2026 |
| 10 | Flourishglobal Peptide | A | 2 | 10.0 | 10.0 | 10.0 | 4 Jul 2026 |
| 11 | Homopeptide | A | 7 | 9.9 | 9.9 | 10.0 | 24 May 2026 |
| 12 | Mokemei Biotechnology | A | 4 | 9.9 | 9.9 | 10.0 | 16 May 2026 |
| 13 | Shanghai Sigma Audley | A | 4 | 9.9 | 9.9 | 10.0 | 22 Jul 2026 |
| 14 | WuXi TIDES | A | 4 | 9.9 | 9.9 | 10.0 | 12 Jul 2026 |
| 15 | JEEP Peptides | A | 3 | 9.9 | 9.9 | 10.0 | 9 Jun 2026 |
| 16 | Glbiochem (Shanghai) | A | 4 | 9.2 | 8.4 | 10.0 | 24 May 2026 |
| 17 | Qingdao Sigma Chemical QSC | A | 8 | 9.1 | 8.4 | 10.0 | 21 May 2026 |
| 18 | Wuhan Wansheng Bio (WWB) | A | 5 | 8.7 | 7.0 | 9.8 | 24 May 2026 |
| 19 | Shanghai Sigma Audley SSA | A | 6 | 8.3 | 7.5 | 10.0 | 23 May 2026 |
| 20 | Nantong Guangyuan Chemical GYC | A | 7 | 8.0 | 6.9 | 8.4 | 23 May 2026 |
| 21 | The Naughty Needle | X | 1 | 10.0 | 10.0 | 10.0 | 17 Dec 2024 |
| 22 | Shenzhen Loga Tech LG LOGA | B | 2 | 9.2 | 9.1 | 9.4 | 20 May 2026 |
| 23 | Anlv Biotechnology | X | 1 | 9.2 | 9.2 | 9.2 | 9 Jun 2025 |
| 24 | AKS Chem | X | 1 | 8.9 | 8.9 | 8.9 | 6 May 2025 |
| 25 | BeiBangAn | C | 3 | 8.8 | 8.5 | 9.2 | 25 May 2026 |
| 26 | Science | X | 1 | 8.2 | 8.2 | 8.2 | 3 Jul 2025 |
| 27 | Pharma Grade Peptides | X | 1 | 8.1 | 8.1 | 8.1 | 14 Jan 2025 |
| 28 | Dankang BioHealth | X | 1 | 8.0 | 8.0 | 8.0 | 6 May 2025 |
| 29 | Verified Peptides | A | 2 | 7.8 | 7.6 | 7.9 | 21 May 2026 |
| 30 | Xingruida XDR | B | 6 | 7.5 | 4.9 | 8.7 | 25 May 2026 |
| 31 | Hunan Ruiwang Technology Center | X | 1 | 7.5 | 7.5 | 7.5 | 2 Jul 2025 |
| 32 | Top Peptide | C | 2 | 7.3 | 7.0 | 7.7 | 25 May 2026 |
| 33 | Injectify | A | 2 | 7.3 | 5.0 | 9.7 | 19 Jan 2026 |
| 34 | Shanxi Qianyecao Biotech QYC | D | 6 | 7.0 | 5.8 | 8.9 | 26 Jan 2026 |
| 35 | Haikou Mingheng Biotechnology | X | 1 | 6.9 | 6.9 | 6.9 | 13 Feb 2025 |
| 36 | Bulk Peptide Supply | X | 1 | 6.8 | 6.8 | 6.8 | 17 Dec 2024 |
| 37 | Changan District Sheng Peptide Trading | X | 1 | 6.7 | 6.7 | 6.7 | 24 Apr 2025 |
| 38 | LiliPeptide | C | 15 | 6.5 | 4.0 | 10.0 | 19 Jan 2026 |
| 39 | Accelerate Labs | X | 1 | 6.3 | 6.3 | 6.3 | 9 Jun 2025 |
| 40 | Modern Aminos | X | 1 | 6.3 | 6.3 | 6.3 | 24 Apr 2025 |
| 41 | Peptide Crafters | A | 3 | 6.2 | 3.9 | 7.6 | 20 May 2026 |
| 42 | Biolongevity Labs | A | 2 | 5.9 | 5.6 | 6.3 | 23 May 2026 |
| 43 | Zhejiang Yichenkang Biotechnology | B | 3 | 5.8 | 4.1 | 6.8 | 20 May 2026 |
| 44 | Elite Research USA | X | 1 | 5.5 | 5.5 | 5.5 | 13 Feb 2025 |
| 45 | LSPL | C | 4 | 5.1 | 3.6 | 6.7 | 24 May 2026 |
| 46 | Limitless Life Nootropics | X | 1 | 5.0 | 5.0 | 5.0 | 2 Jul 2025 |
| 47 | Richards Biotech Simply Richards | X | 1 | 4.8 | 4.8 | 4.8 | 3 Jun 2025 |
| 48 | Peptronix Bio PTB | X | 1 | 4.7 | 4.7 | 4.7 | 28 Mar 2025 |
| 49 | Oasis Peptides | X | 1 | 4.7 | 4.7 | 4.7 | 14 Jan 2025 |
| 50 | Wolverine Peptides | X | 1 | 3.8 | 3.8 | 3.8 | 9 Jun 2025 |
| 51 | Swiss Chems | X | 1 | 3.7 | 3.7 | 3.7 | 13 Jun 2025 |
| 52 | PeptiLab Research | X | 1 | 3.2 | 3.2 | 3.2 | 21 May 2025 |
| 53 | Deuschem | X | 1 | 3.2 | 3.2 | 3.2 | 3 Jul 2025 |
| 54 | NuLife Peptides | X | 1 | 1.9 | 1.9 | 1.9 | 2 Apr 2025 |
| 55 | Explicit Sarms | X | 1 | 0.4 | 0.4 | 0.4 | 25 Apr 2025 |
| 56 | Hebei Chengtong Technology | X | 1 | 0.0 | 0.0 | 0.0 | 13 Jun 2025 |
| 57 | Marvel Peptide | X | 1 | 0.0 | 0.0 | 0.0 | 16 Mar 2025 |