Tirzepatide · Batch 2026 · 99.699% purity
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Quality & Certificates of Analysis
We prove quality with documents, not adjectives — independent third-party testing and a COA for every batch.
Independent third-party testing on every batch
Each production batch is tested by an independent third-party laboratory using HPLC (for purity) and mass spectrometry (for identity). The resulting Certificate of Analysis reports the batch number, purity percentage, and method — so you can confirm quality yourself, not take our word for it.
- HPLC purity — the target compound as a share of total, with chromatogram.
- Mass-spec identity — molecular weight confirms the correct peptide.
- Batch traceability — the COA's batch number matches the vial.
Learn how to read a peptide COA → · See what “third-party tested” should prove →
Published 2026 Certificates of Analysis
Third-party reports for Certiva's 2026 Tirzepatide, Retatrutide, and Semaglutide batches.
Retatrutide · Batch 2026 · 99.699% purity
Semaglutide · Batch 2026 · 99.599% purity
Frequently asked questions
Does every batch come with a Certificate of Analysis?
Yes. Every production batch is third-party tested and issued a Certificate of Analysis (COA) reporting HPLC purity and identity, tied to a traceable batch number. We publish selected 2026 reports below and share matching documents for other batches on inquiry.
What testing methods do you use?
Identity and purity are verified by HPLC (High-Performance Liquid Chromatography) and mass spectrometry, performed by an independent third-party laboratory.
Can I verify a COA independently?
Yes. Each COA names the testing lab, batch number, method, and date, so the result can be cross-checked. The batch number on the COA matches the vial.
What purity do your peptides report?
Research peptides typically report 98–99%+ HPLC purity, documented per batch on the COA. Exact figures are stated on each batch document.
Need another batch COA?
Tell us the product and batch, and we'll send the matching Certificate of Analysis with your quote.