Trust the Data. Not the Source.
| Vendor / Client | Tests | Best Purity | Latest Test |
|---|---|---|---|
| Uther | 4 | 99.79% | 29 JUN 2025 |
| Sigma Audley | 3 | 99.81% | 02 MAY 2025 |
| Peptide Gurus | 2 | 99.48% | 05 MAY 2025 |
| Shanghai Senria Tech | 2 | 99.76% | 02 OCT 2025 |
| Shanghai Fushida Chemical | 2 | 99.50% | 23 JUL 2025 |
| InnoPeptide | 2 | 99.62% | 31 DEC 2025 |
| utherpeptide.com | 2 | N/A | 20 JAN 2026 |
| XT Peptides | 1 | 99.48% | 29 APR 2025 |
| cdtongtuantai@163.com | 1 | 99.21% | 23 JUN 2025 |
| Qing Li Peptide | 1 | 99.45% | 25 JUN 2025 |
| Peptide Sciences | 1 | 99.47% | 2024-08 |
| Cathy | 1 | N/A | 28 APR 2025 |
| HM Peptide | 1 | 99.73% | 12 AUG 2025 |
| Texpeptides@gmail.com | 1 | 99.42% | 01 OCT 2025 |
| Cocer Peptides | 1 | 99.77% | 27 OCT 2025 |
| liuquanqun@gmail.com | 1 | 99.68% | 03 NOV 2025 |
| Coastal Peptides | 1 | 99.45% | 10/01/25 |
| Qingdao Sigma Chemical | 1 | 98.99% | 13 DEC 2024 |
| Angel Shanghai Chemical | 1 | 99.52% | 23 JAN 2025 |
| M Peptide Science | 1 | 99.97% | 08 MAY 2025 |
| Shanghai Synthesized Peptide Bio-Pharmaceutical | 1 | 99.71% | 05 JAN 2026 |
| HK Peptide Ltd | 1 | 99.56% | 18 DEC 2025 |
| Orbitrex Peptides | 1 | 99.49% | 08 JUL 2025 |
| Alpha & Omega Peptide | 1 | 99.45% | 2025-06-05 |
| crystalpeptides.eu | 1 | 99.34% | 08 DEC 2025 |
| Penguin Peptides | 1 | 99.35% | 28 JUL 2025 |
| cellpept.eu | 1 | 99.07% | 21 OCT 2025 |
| JP | 1 | 99.49% | 01 SEP 2025 |
| G | 1 | 99.48% | 21 NOV 2025 |
| Boris Boot info@rcpeptides.nl | 1 | 99.09% | 10 OCT 2025 |
| Walker Chemicals (WKC) | 1 | 99.75% | 31 DEC 2025 |
| east peptide | 1 | 99.70% | 06 JAN 2026 |