Third-Party Tested Research Peptides: Lab Testing and Quality
Don’t just take our word for it: verify it. Our peptides are produced in our own cleanroom and tested by Janoshik, an independent analytical laboratory. Every report we publish comes with a key you can check on Janoshik’s own website. And if an order fails your own testing, we refund it.
Third-party tested peptides: our Janoshik results
In a blind test, Janoshik was asked to identify which GLP-1 peptide each vial contained, measure the amount and assess purity. These are the results:
| Sample | Compound identified | Amount measured | Purity | Janoshik task | Verification key |
|---|---|---|---|---|---|
| SM5 (5mg vial) | Semaglutide | 5.23 mg | 99.564%* | #219512 | FMJRESLFP7TG |
| RT5 (5mg vial) | Retatrutide | 6.11 mg | 99.731% | #219513 | ZIL316MHRLK1 |
| TR5 (5mg vial) | Tirzepatide | 5.76 mg | 99.878% | #219514 | 4858Y9U964FC |
*Janoshik notes that the purity figure for SM5 includes peptide peaks only.
The original Janoshik reports
Tap a report to see it full size.
What the results show
- Correct identity: in a blind test, each vial was identified as the compound on its label.
- Full fill: all three vials contained at least the labelled 5mg.
- High purity: purity measured between 99.5% and 99.9%.
All three samples were received by Janoshik on 2 September 2026 and analysed on 4 September 2026. The tests were ordered under our laboratory account, best-peptidelab, which is the client name shown on each report. The reports list the manufacturer and batch as “Unknown”.
Verify any report yourself
Go to janoshik.com/verify and enter the verification key from the table. Janoshik will show you the original report, straight from the laboratory. These results apply to the vials that were tested; if you would like the test report for the batch you are ordering, ask us when you request a quote.
Made in our own cleanroom
We do not resell anonymous stock. Our vials are filled and capped in our own cleanroom facility, where staff work in full cleanroom gowns, hair covers and masks, and vials move through an automated filling and capping line. Controlling production ourselves is how we keep quality consistent from one order to the next. Finished vials are then kept in refrigerated storage until they are packed for shipping.
Vials being filled and capped in our cleanroom
Finished stock in refrigerated storage
Our money-back testing guarantee
We are confident enough in our peptides to back them with a guarantee: if you test an order and it does not meet the required standard, we refund it. Send us your test results on Telegram or by email and we will resolve it with you.
Research use only
All our products are sold for laboratory research use only. They are not medicines or supplements and are not for human or veterinary use.
Order tested research peptides
Ask us for a quote, or for the test report on any product you are considering. See also shipping and delivery and about us.
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