Ck Peptides vs Xlpeptides: which UK peptide vendor is more verifiable?

Both Ck Peptides and Xlpeptides publish their own verifiable Janoshik certificate of analysis, so both clear The Peptide Watch's bar; ranked by most recent certificate, Ck Peptides (Mar 2026) is currently more recent than Xlpeptides (Mar 2026). Both are among the only 28 of 318 UK sellers that pass. The Peptide Watch takes no vendor money.

Full audits: Ck Peptides · Xlpeptides. Both appear on the independently-tested list.