The words UK peptide sellers use, and what they actually mean. If a shop told you something about its testing and you want to decode it, start here, then learn to verify a COA or check one with the COA Checker.
A laboratory report on one specific batch of a peptide: its identity, purity, and screening for contaminants. The only objective evidence of what is in a vial.
The independent Prague laboratory that is the gold standard for peptide testing; its reports carry a unique code verifiable at janoshik.com.
A test run by an outside laboratory, the only kind that counts. 'In-house' and 'our own QC' testing do not.
The seller's own document with no independent lab named, the seller marking its own homework.
A genuine report whose client field names a supplier or a different brand, not the seller displaying it. It proves someone else's batch, not this seller's stock.
No certificate is published; the seller promises to email one after purchase. Treat it as none.
A raw-material supplier's own quality sheet, not an independent test of the seller's finished batch.
A 'laboratory' with no website, listing or independent trace, often a name printed only on the seller's own documents.
High-performance liquid chromatography and mass spectrometry, the standard methods for confirming peptide identity and purity.
A real independent laboratory in Poland; genuine, but its reports are less widely verifiable than Janoshik's.