How our lab results work
By Kobi Williams · Founder, responsible for Quality Assurance · Updated 2026-09-28
We buy wholesale from established distributors, each of which has independent third-party testing done on its batches. Each certificate is tied to its lot number, and we send your batch’s certificate on request. Here is exactly what they cover, and what they don’t.
The labs. Our certificates come from independent testing labs, not the manufacturer grading its own product. Because the distributor sent the samples, the client named on a certificate is usually the distributor rather than us.
What the certificates measure
HPLC-UV purity
High-performance liquid chromatography with UV detection. This is the primary purity measurement: it separates the target peptide from impurities and reports the percentage that is the intended compound. It is on every certificate we publish.
Measured content
The milligrams the lab actually found in the vial, against the labelled amount, so you can see whether a “10 mg” vial holds what it says. Also on every certificate.
Extras on some certificates
Some reports add an appearance check of the freeze-dried powder, or identity by retention time and spectral match. None of our certificates include LC-MS (mass-spectrometry) identity or sterility testing, so we don’t claim them.
What you get
The COA shows the lab’s name, report number, test date, measured purity and measured content — not just a pass/fail stamp, so you can read the primary data yourself. Certificates and batch lookups are kept in our members-only area, and the certificate for your batch is available on request.
Lab results · Members only
Certificates of Analysis and batch lookups are in our members-only area. Need the certificate for your order? Email sales@popularpeptides.ca with your order number.
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 (purity and content); it is not a statement about any biological effect.