How can I verify the authenticity of a certificate of analysis?

Identify the laboratory named on the report, confirm it is a real and independent business, and ask it to confirm the report ID and batch number. Then match the batch number to the vial label.

Can a peptide COA be faked?

Yes. A COA is usually a PDF, and a PDF can be edited or copied. This is why confirmation from the issuing laboratory matters more than the appearance of the document.

What is the difference between a generic and a batch-specific COA?

A generic COA describes typical results for a product. A batch-specific COA reports the results for one numbered production batch and can be matched to a vial.

Does a COA prove a peptide is sterile?

No. A standard COA reports purity and identity. Sterility and endotoxin results come from separate tests and appear only if those tests were ordered.

What purity should a research peptide COA show?

Many research suppliers specify 98% or 99% and above by HPLC. The number matters less than whether the full chromatogram is provided and the laboratory can confirm it. For research use only. Not for human or animal consumption.

Peptide Guides Archives

Free UK Delivery on orders over £75 Free UK dispatch over £75 • Secure SSL checkout • ≥99% purity, third-party tested

Peptide Guides

October 13, 2026 · zentralabs

How to Verify a Peptide Certificate of Analysis Is Genuine

Quick answer “To verify a peptide certificate of analysis, confirm that the testing laboratory exists and is independent, match the…

Bacteriostatic water vs sterile water infographic - Zentra Labs

Peptide Guides

September 9, 2026 · zentralabs

Bacteriostatic Water vs Sterile Water: Which Solvent Should You Use for Peptide Reconstitution?

When research peptides arrive as lyophilised powders, they usually need to be reconstituted before use in laboratory experiments. Two solvents…

MOTS-C 10mg peptide vial with mitochondria graphic - Zentra Labs

Peptide Guides

August 20, 2026 · zentralabs

What Is MOTS-c? A Research Overview of the Mitochondrial-Derived Peptide

For much of the twentieth century, mitochondria were primarily recognised as the cell’s energy-producing organelles, with their function largely confined…

GHK-Cu research peptide pen and vial banner - Zentra Labs

Peptide Guides

August 6, 2026 · zentralabs

GHK-Cu Copper Peptide: Research Background, Structure and Laboratory Considerations

Copper has been recognised as essential to human biology for well over a century. Its connection to one particular tripeptide,…

Registered Office

2 Jubilee House
Jubilee Walk
Crawley
England
RH10 1LQ

Company Number: 17260138

Disclaimer for Zentra Labs Purchase

By purchasing from Zentra Labs, you acknowledge and agree that:

Research use only

All products are exclusively sold for laboratory and scientific research purposes. They are not intended for human use, therapeutic, diagnostic, or clinical application.

Not medical products

None of the products listed on our website are medical products, nor should they be marketed or used as such.

Compliance and responsibility

The buyer is responsible for ensuring compliance with all relevant laws and regulations. Zentra Labs holds no liability for misuse of products or any adverse outcomes.

Your purchase signifies your understanding and agreement to these terms.

Peptide Guides Articles

How to Verify a Peptide Certificate of Analysis Is Genuine

Bacteriostatic Water vs Sterile Water: Which Solvent Should You Use for Peptide Reconstitution?

What Is MOTS-c? A Research Overview of the Mitochondrial-Derived Peptide

GHK-Cu Copper Peptide: Research Background, Structure and Laboratory Considerations

Stay ahead of the research curve.

Registered Office

Disclaimer for Zentra Labs Purchase

Research use only

Not medical products

Compliance and responsibility