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