How to Verify a Peptide COA in Three Steps

This is the check that eliminates most bad certificates and takes ten seconds. Read the batch or lot number printed on the vial label. Read the batch number on the certificate. They either match or they do not.

The most common failure in the market is not a forged certificate. It is a genuine certificate for a different lot, republished indefinitely because the numbers on it are good. A supplier showing you a certificate from 2024 for a vial filled in 2026 has shown you a real document about material you are not buying.

• ·If the vial has no batch number at all, stop. Nothing downstream can be verified.
• ·If the certificate has no batch number, the same applies.
• ·If they differ, ask why before ordering rather than after.

A PDF hosted by a seller proves that the seller has a PDF. The check that actually matters is whether the issuing laboratory will confirm the same report independently.

Janoshik Analytical, the most widely used independent laboratory in this market, issues every report with a unique key that anyone can look up on the laboratory's own site. That property is what makes its certificates worth something: a supplier can fabricate a document, and cannot fabricate an entry in someone else's database.

What to do: open the certificate, find the report link or key, and check it at the laboratory. The report the laboratory shows you should carry the same client, the same batch, the same date and the same numbers as the copy the seller published. If any of those differ, the seller has edited something.

Published Certificate

Select strength

10mg12mg20mg

Batch

BPC-CA-25L-01

Purity (HPLC)

99.765%

Measured content

10.98 mglabeled 10 mg

Laboratory

Janoshik

Verify on the lab’s own databaseAll published certificates

These are the two numbers that get conflated, and conflating them is how a buyer ends up satisfied with half an answer.

Purity is measured by HPLC and reported as a percentage. It answers: of the peptide material present in this vial, what fraction is the stated compound? It says nothing about how much material is present.

Measured content is a quantitative result, reported in milligrams. It answers: how much of the compound is actually in this vial, against what the label claims? A vial can be 99.6% pure and hold 5 mg where the label says 10 mg. The purity figure will be entirely accurate and you will have lost half of what you paid for.

A certificate reporting only purity has answered one of two questions. The longer treatment is at purity vs fill accuracy.

• ·Identity (mass spectrometry): is it the right molecule? Catches substitution.
• ·Purity (HPLC): what fraction of the peptide present is that molecule? Catches poor synthesis.
• ·Content (quantitative): how much is in the vial against label? Catches underfilling.

• ·The client name, which should be the supplier you are buying from and not a different company.
• ·The sample or product name, matching what you are being sold.
• ·A batch or lot number, matching the vial.
• ·The test date, recent enough to concern the current lot.
• ·Identity confirmation by mass spectrometry.
• ·HPLC purity as a number, not as a claim.
• ·Measured content in milligrams against the labeled amount.
• ·A verification key or link resolving on the laboratory's own site.

Blends. HPLC purity is defined against a single analyte, so a two-compound vial cannot carry one meaningful purity percentage. A correct blend certificate reports measured mass per component with identity confirmed for each. A single purity figure on a blend certificate is a signal that something has been simplified that should not have been.

Non-peptides. NAD+ and small molecules such as 5-Amino-1MQ are not made by peptide synthesis and do not have a peptide impurity profile. Their certificates commonly emphasize content and identity over an HPLC area-percent figure, and that is appropriate rather than evasive. Ask what analyte a quoted purity figure was measured against.

Every Eppix lot is tested by Janoshik Analytical before it is listed, and the certificate is published before the lot goes on sale rather than supplied on request afterwards. Each certificate carries the batch code printed on the vial label and a link to the report on the laboratory's own database.

The full archive is at certificates of analysis, and the batch lookup is at verify. What the testing laboratory does and does not test is covered in Janoshik testing explained, and the failure modes are catalogued in how to spot a fake COA.