Both Wolverinepeptides and Tested Peptides publish their own verifiable Janoshik certificate of analysis, so both clear The Peptide Watch's bar; ranked by most recent certificate, Wolverinepeptides (Feb 2026) is currently more recent than Tested Peptides (Jan 2026). Both are among the only 28 of 318 UK sellers that pass. The Peptide Watch takes no vendor money.
| Checkable fact | Wolverinepeptides | Tested Peptides |
|---|---|---|
| Own-name Janoshik COA | Yes | Yes |
| Latest certificate date | Feb 2026 | Jan 2026 |
| Verified rank | #20 | #21 |
Full audits: Wolverinepeptides · Tested Peptides. Both appear on the independently-tested list.