Quality you can verify
Every shop claims the highest quality. We show it: for every batch we publish the report of an independent laboratory before you buy, and you can verify it at the laboratory with a key.
What is measured for every batch
| Measurement | Method | Purpose |
|---|---|---|
| Purity | HPLC | How clean the sample is |
| Measured amount | Quantification against a reference | How much peptide is actually in the vial |
| Identity | Mass spectrometry or comparison with reference substances | Whether it is the right molecule |
From vial to report
- Batch number on the label: every vial carries its batch number.
- Report on the product page: under the size you select you see the current batch report with purity, amount and laboratory.
- Archive: all reports, including earlier batches, are in the lab report archive.
- Verification: the key lets you retrieve the report from the laboratory and compare it with our PDF.
Why the measured amount matters
'10 mg' on a vial describes the powder. How much of it is peptide only the measurement shows. We publish this value because it determines your concentrations; you can use it directly in the peptide calculator.
Identity: where mix-ups happen
- Retatrutide is blind-tested against semaglutide and tirzepatide, which are often confused on the market.
- TB-500 is checked for whether it is complete thymosin beta-4 or only the short fragment; ours is complete Tβ4 (more).
Reading a report yourself
A step-by-step guide is peptide purity: reading HPLC, MS and the COA; further reading: how to read a chromatogram and endotoxin and water content.
Who runs Peptidkauf and how we work is described on the about us page.