12 Questions to Ask a Peptide Manufacturer Before Importing

Importing peptides means placing your clinic's name on decisions made in a facility you will probably never visit. You cannot audit every manufacturer yourself, but you can ask questions whose answers, or evasions, tell you nearly as much. Bring this list to any serious sourcing conversation, and treat the quality of the answers as data about the quality of the product.

Licensing and manufacturing practice

1. What is your manufacturing licence, and who issued it?

A licence establishes that a regulator in the manufacturer's jurisdiction has authorized production at all. Ask for the number and issuing body, and verify both.

2. Do you hold a current GMP certification?

Good manufacturing practice certification shows the facility operates under a recognized system of production controls. Ask when it was last audited, and by whom. An expired certificate is history, not evidence.

3. Can we review a batch record for a recent production run?

A batch record is the manufacturing log for a single run: materials, steps, in-process checks. Manufacturers with real quality systems produce them routinely; reluctance here is a red flag.

Batch-level evidence

4. Will you supply a certificate of analysis for every lot we receive?

The CoA must be tied to the specific batch shipped to you, not a generic or historical one. If the answer is "on request" rather than "with every shipment," ask why.

5. What analytical methods do your CoAs use?

Named methods (for identity, assay, purity) let an independent laboratory reproduce or challenge the result. Verdicts without methods cannot be verified.

6. What is the impurity profile of this product?

Every synthesis leaves traces. A manufacturer who knows their impurity profile (synthesis by-products, degradation products, residual solvents) understands their own process. One who cannot discuss it may not.

7. Do you use reference standards, and from where?

Reference standards are highly characterized materials used to calibrate testing. Testing anchored to recognized standards carries more weight than testing against internal material alone.

Stability, storage, and logistics

8. What stability data supports the stated shelf life?

An expiry date should rest on data gathered under defined temperature and humidity conditions: conditions relevant to the Philippine climate, not only a temperate warehouse.

9. What are the storage and transport requirements, and can your cold chain meet them door to door?

A cold chain is an unbroken sequence of temperature-controlled storage and transport. Ask where it begins, where it ends, and how temperature is monitored in between. A gap in Manila heat can undo a verified product.

10. How is the product packaged, and is the packaging tamper-evident?

Tamper-evident packaging makes interference visible. It is a small feature that answers a large question: has anyone opened this between the factory and my clinic?

Accountability

11. What is your recall procedure, and has it ever been used?

Every honest manufacturer has either run a recall or has a written procedure ready. A claim that recalls "will never be needed" signals optimism, not rigor.

12. How do you handle quality complaints from customers?

You want a named process: who investigates, how batches are traced, how findings are reported back. Complaint handling is the moment a quality system proves it exists.

How to use the answers

Document every answer, keep it with your supplier records, and revisit it annually. Certifications expire and ownership changes. Then remember the limits of even perfect answers: a manufacturer's own documentation is their claim about themselves. It is the first gate of responsible sourcing, not the last. Independent verification of the batches you actually receive (the approach behind Pepty'sindependent testing and the sourcing gate of thePlatinum Standard) is what confirms the claims hold for the product in your hands. Our guide onresponsible sourcingcovers the full documentation pathway.

Common questions

What if a manufacturer refuses to answer some questions?

Treat the refusal itself as the answer. Legitimate manufacturers field these questions from regulators and institutional buyers routinely; evasion on licensing, batch records, or recall procedures is reason to look elsewhere.

Is a trading company the same as a manufacturer?

No, and that is exactly why these questions matter. Many suppliers are intermediaries. Ask who actually manufactures the product, and direct the manufacturing questions to that entity. A trader who cannot or will not connect you to those answers adds opacity to your supply chain.