How we verify every batch
By Kenan Williams · Founder, responsible for Quality Assurance · Updated 2026-07-15
Every batch of research peptide we sell is sent to an independent third-party laboratory before it’s offered for sale, and the full Certificate of Analysis is published and tied to a verifiable lot number. Here is exactly what that testing covers.
The lab. Analysis is performed by TESTIDES, an independent North American peptide-testing laboratory — separate from our supply chain, so the results aren’t self-graded.
The panel run on each batch
HPLC-UV purity & content analysis
High-performance liquid chromatography with UV detection (chromatogram recorded at 214 nm). This is the primary purity measurement: it separates the target peptide from impurities and reports the percentage that is the intended compound.
LC-MS identity
Liquid chromatography–mass spectrometry confirms the molecule’s identity matches the label, catching substituted or mislabeled material.
Content / fill accuracy
Measured mass against labelled mass, so a “20 mg” vial delivers what it claims.
Appearance
Physical inspection of the lyophilized (freeze-dried) powder.
Sterility
Screen on the finished vial.
What you get
The published COA shows the report number, test date, measured purity, and the actual chromatogram — not just a pass/fail stamp. You can read the primary data yourself. Across our 8 most recently published batches, HPLC purity has run from 98.41% to 100.00% — see the full Quality Report.
Check your vial
Enter the batch/lot number from your order to open the matching certificate. If a supplier can’t give you that, the purity figure is unverifiable.
All products are supplied for in vitro laboratory research use only and are not intended for human or veterinary consumption. Testing described here measures analytical quality, identity, and sourcing; it is not a statement about any biological effect.