MZ Biolabs is the name printed in the laboratory position on 33 documents in the register, published by Ascension Peptides, Biotech Peptides, Blue Sky Peptide and Peptide Pros. Every one of them carries a lot identifier; every one is dated, the earliest 2021-07-01 and the latest 2026-09-23; 31 print a purity figure, between 93.13% and 100%. The method printed is HPLC+MS. The documents are pdf and web page, covering 25 distinct peptides.
The Biotech Peptides file places the laboratory in Tucson, Arizona, with HPLC-UV-MS on the certificate; the Ascension Peptides file pairs each MZ Biolabs report with a second report from Kovera Labs on the same lot.
A laboratory name on a certificate is the supplier's statement that this laboratory produced the report. The desk records it as printed and does not merge spellings, rank laboratories or confirm the report with the laboratory on a reader's behalf; what a name does make possible is the question, which is set out in How to verify a peptide COA with the lab and Peptide testing labs explained. A purity figure in the table is the laboratory speaking about one lot on one date, not a score.