Both Kensingtonlabs and Imperialpeptides publish their own verifiable Janoshik certificate of analysis, so both clear The Peptide Watch's bar; ranked by most recent certificate, Kensingtonlabs (Jul 2025) is currently more recent than Imperialpeptides (2025-2026). Both are among the only 28 of 318 UK sellers that pass. The Peptide Watch takes no vendor money.
| Checkable fact | Kensingtonlabs | Imperialpeptides |
|---|---|---|
| Own-name Janoshik COA | Yes | Yes |
| Latest certificate date | Jul 2025 | 2025-2026 |
| Verified rank | #26 | #27 |
Full audits: Kensingtonlabs · Imperialpeptides. Both appear on the independently-tested list.