Retatrutide Lot Testing History
Certificates of Analysis / Retatrutide
Public testing history for retatrutide research peptide supplied by PureLab Performance. Every lot we have had independently assayed is listed here permanently. The latest published testing reference appears first, with earlier certificates retained below. Match the supplier batch on your material to the corresponding certificate. Test results are never removed or replaced. Figures are copied from the issued certificates. For research use only. Not for human consumption.
| Compound | Retatrutide (research peptide) |
| Development code | LY3437943 |
| Class | GIP / GLP-1 / glucagon triple agonist |
| CAS | 2381089-83-2 |
| Formula | C221H342N46O68 |
| M.W. | 4731.33 g/mol |
Current testing reference
| Supplier batch | 0394 |
| Certificate ID | jfwj6ve |
| Laboratory | Krause Analytical through Finnrick |
| Report issued | September 17, 2026 |
| Chromatographic purity | >99.9% |
| Identity | Confirmed |
| Endotoxin | Not detected (reporting limit: 1 EU/vial) |
View original Retatrutide COA (PDF) · Retatrutide research peptide
All available vial sizes came from this compound’s respective supplier batch. This COA serves as that batch’s testing reference and reports the submitted sample results. Endotoxin below the reporting limit is not a sterility result.
Earlier tested record — fghe8m6
The earlier certificate is preserved below. Its results apply to that submitted sample, not to supplier batch 0394.
| Lot number | fghe8m6 |
| Laboratory | Krause Analytical, Austin, Texas (independent, third-party) |
| Report issued | 5 August 2026 |
| Identity | Confirmed — mass spectrometry versus an authentic standard |
| Chromatographic purity | >99.9% |
| Content versus label | 87.6% (26.3 mg of 30 mg stated — this lot was a 30 mg fill) |
| Method | HPLC-UV-MS · USP/NF 621 |
Download the certificate PDF · Retatrutide product page
Endotoxin was not reported for lot fghe8m6, so no endotoxin figure appears here. The lot tested was a 30 mg fill; Certificates for additional tested lots are published as each lot is released. We publish results as returned — including the 87.6% content-versus-label figure above.
How to verify a certificate with the issuing laboratory · All certificates
FOR RESEARCH USE ONLY · NOT FOR HUMAN CONSUMPTION · Lab research chemicals.