Retatrutide 99.0% Purity — Zlz PeptideCertificate of Analysis · Independent third-party lab result
This COA was tested by an independent third-party lab, LabE. The retatrutide batch R5 showed 99.02% purity via HPLC and mass quantification. The tested quantity was 5.31mg, a 6.2% deviation from the 5mg label. Endotoxin status is not available, and the test is older (6-12 months). Customers can cross-check on the lab's public verification URL.
- no endotoxin test
- older (6-12 months)
- Test date
- 2025-10-23
- Testing lab
- LabE
- Batch / lot
- R5
- Quantity
- 5.31mg
- Endotoxins
- —
- Assay method
- HPLC + mass quantification + endotoxins
- Test score
- 7.6
- Label dose
- 5mg
How this result compares
This Retatrutide certificate's tested purity of 99.02% ranks higher than 4% of the 9821 Retatrutide certificates with a purity result we have catalogued (median 99.83%).
Tested 2025-10-23 by LabE via HPLC + mass quantification + endotoxins. This test is newer than 21% of our catalogued Retatrutide certificates.
Zlz Peptide has 274 certificates in our corpus, including 100 for Retatrutide at a median tested purity of 99.84%.
Test report image
Finnrick
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