How to Read a Selank Certificate of Analysis
What KYIN Peptides' Selank certificate of analysis actually reports, and how to independently verify it.
What KYIN's Selank COA Reports
Every batch of KYIN's Selank is independently tested by Janoshik to over 99% purity. The certificate reports an HPLC purity result and a mass spectrometry identity confirmation verifying the sample's molecular weight matches Selank's expected heptapeptide sequence (the tuftsin sequence plus the Pro-Gly-Pro stabilizing addition).
Why Confirming the Full Sequence Matters
Because Selank is tuftsin with an added stabilizing tripeptide, a synthesis error that produces unstabilized tuftsin, or an incomplete Pro-Gly-Pro addition, could still resemble Selank in a basic screen while behaving very differently in research use (given tuftsin's rapid degradation in solution). Mass spectrometry confirmation of the full seven-amino-acid sequence is the most direct way to rule this out.
Research Peptide vs Prescription Nasal Spray
Selank is also sold in Russia as an approved prescription anxiolytic nasal spray, a different regulatory category, formulation, and delivery route from the lyophilized research peptide KYIN sells for laboratory reconstitution. The certificate of analysis for the research peptide reflects that product specifically, and shouldn't be conflated with claims made about the prescription nasal-spray version.
How to Verify Independently
Selank's certificate of analysis can be independently checked at janoshik.com/verify using the batch number printed on the document, confirming the result against Janoshik's own testing records rather than the PDF alone. See our general How to Read a Certificate of Analysis guide for how to interpret the rest of the report.
Selank testing questions
What purity does KYIN Peptides' Selank meet?
KYIN Peptides' Selank is independently tested by Janoshik to over 99% purity, with mass spectrometry identity confirmation of the full heptapeptide sequence — see the current batch's certificate of analysis on the product page.
Why is confirming Selank's full sequence especially important?
Selank is tuftsin with a stabilizing Pro-Gly-Pro addition. An incomplete synthesis could resemble unstabilized tuftsin, which behaves very differently due to its rapid natural degradation — mass spectrometry confirmation of the full sequence is the most direct way to rule this out.
Interested in Selank?
See pricing, current batch purity, and the full certificate of analysis on the product page.