Guides
Peptide testing guides
Plain answers about testing research peptides: what it costs, which panel to choose, how to send a sample, how to read and verify a certificate, and how Veritalys compares with Janoshik.
Before you order
- Which peptide test do you need? The three panels explainedIdentity, content and purity, plus endotoxin, or the full panel with microbiology. Which question each panel answers, who needs it and the price.
- How much does peptide testing cost in 2026? A full breakdown.Peptide testing costs €169 to €629. What each panel buys, why prices vary by compound, and where add-ons double the bill.
- How to get a peptide tested in Europe, and how to read the certificate you get backHow peptide testing works from order to report, what a certificate must contain to be worth anything, and how to check a report is real.
- How to pack and post a peptide sample for testingWhat to send, how to label it so it cannot get lost, how to pack one vial, and how to post it from inside or outside the EU.
Reading a result
- How to tell if a peptide COA is realA certificate of analysis is easy to fake and easy to reuse. Eight checks that take five minutes, and how to verify a report with its issuer.
- Purity is not content: why a 99% pure vial can still be shortPurity is a ratio, content is milligrams. A vial can show 99% purity and hold a third less than the label says. Here is the arithmetic.
- Endotoxin testing for peptides: what the number on the certificate meansEndotoxin belongs on a certificate as a number in EU per vial, not the word negative. What the LAL test measures and what it costs.
- How to read a peptide HPLC chromatogramThe graph on a peptide certificate in plain language: the axes, how purity comes from peak area, small peaks and shoulders, and its limits.
- Why two labs can test the same peptide and get different resultsOne lab says 98%, another 91%, a third 8.2 mg. Seven reasons results differ, which differences are normal, and how to compare certificates.
Specific tests
- Testing semaglutide, tirzepatide and retatrutideTesting semaglutide, tirzepatide or retatrutide in the EU: what identity, content and purity show, what it costs, and how to read the result.
- Bacteriostatic water testing: what to check, and why it mattersWhat bacteriostatic water should contain, what can go wrong, and the four results worth measuring: preservative, pH, endotoxin and sterility.
Privacy and comparison
- Anonymous peptide testing: what is shared, and what is notOrder without an account, publish under any name, and decide who sees the result. What appears on a Veritalys report and what never does.
- Looking for a Janoshik alternative in Europe? Here is the comparison.Veritalys costs less than Janoshik on all 39 compounds both list, and its full panel runs four microbiology tests instead of two. Every figure sourced.
What these guides cover
Each guide answers one question people ask before they send a vial: what a test should cost, which panel answers which worry, how to pack and post a sample, what a certificate of analysis has to contain, and how to check a report somewhere the seller does not control. Prices quoted in the guides come from the same list as the price list and the order page, so they are always current.
New to the terms? The glossary explains HPLC, content, endotoxin, EU per vial and the rest in a sentence or two each. New guides appear here and in the RSS feed.