How to Read a Tesamorelin Certificate of Analysis
What KYIN Peptides' Tesamorelin certificate of analysis actually reports, and how to independently verify it.
What KYIN's Tesamorelin COA Reports
Every batch of KYIN's Tesamorelin is independently tested by Janoshik to over 99.7% purity. As with every peptide in KYIN's catalogue, the certificate reports an HPLC purity result and a mass spectrometry identity confirmation. For Tesamorelin specifically, the identity check matters because the molecule differs from unmodified GHRH(1-44) by a single N-terminal chemical modification (the trans-3-hexenoic acid group) — a mass spectrometry result confirms that this specific modified structure is present, rather than an unmodified or otherwise altered peptide that would behave differently in research use.
Why Batch-Specific Testing Matters for Stabilized GHRH Analogs
Tesamorelin's reference vial certificates published on the product page reflect a specific batch and fill size; the certificate notes when the content figure has been scaled to match the vial size actually sold, while the underlying batch identity and testing remain tied to the original tested sample. This is standard practice across the industry for multi-size product lines, but it's worth understanding: always check that the certificate's batch number matches what's printed on your vial, rather than assuming any Tesamorelin certificate applies to any batch.
How to Verify Independently
Janoshik publishes verifiable results at janoshik.com/verify, letting you cross-check the batch number on your certificate against the lab's own records. See our general How to Read a Certificate of Analysis guide for the fundamentals that apply across every compound in KYIN's catalogue.
Tesamorelin testing questions
What purity does KYIN Peptides' Tesamorelin meet?
KYIN Peptides' Tesamorelin is independently tested by Janoshik to over 99.7% purity, with mass spectrometry identity confirmation of the stabilized N-terminal structure — see the current batch's certificate of analysis on the product page.
Why does the certificate reference a different vial size than what I ordered?
Reference certificates sometimes reflect a smaller sample vial from the same tested batch; the content figure scales with fill size, but the underlying batch identity and testing apply to every vial size sold from that batch.
Interested in Tesamorelin?
See pricing, current batch purity, and the full certificate of analysis on the product page.