What to check before choosing a research supplier

Published by Atlantic Longevity. We sell the research materials this site documents, so read this as a supplier's guide, not independent journalism and not medical advice. Nothing here says that any material is safe, effective, or suitable for use in people.

Suppliers of research materials differ widely in what they can actually document. The paperwork is where that difference shows, so it is the first place to look.

1. Treat a certificate of analysis as a starting point

A certificate of analysis (COA) is a laboratory's report of what it measured in one specific lot, and by what method. It is only as useful as it is checkable. Before relying on one, look for:

• The specific material and lot that was tested, and whether that lot number matches the one on the vial you receive.
• The laboratory that did the analysis, named and contactable rather than "in-house".
• The testing date and the analytical method.
• The reported results, including anything the report says it does not cover.

A COA is not, by itself, proof of safety, sterility, or suitability for any use in people. For a field-by-field walkthrough, see how to read a certificate of analysis.

2. Know what each test measures

Different methods answer different questions, and no single result settles every aspect of quality.

• High-performance liquid chromatography (HPLC) is commonly used to characterize purity: how much of the measured material is the intended compound.
• Mass spectrometry helps assess identity: whether the molecule is the one the label says it is.
• Other reports may cover measured content against the label amount, endotoxin levels, or contamination testing. These are separate documents, and a missing one is worth noticing.

3. Match the lot to the vial

A certificate describes one lot, not a product line. A certificate for a different lot of the same compound says nothing about the vial in your hands, however similar it looks. Ask whether the supplier publishes certificates by lot, and whether older lots stay available rather than disappearing when a new one is issued.

4. Look at what the supplier does not promise

A transparent supplier makes it easy to see what is on offer and what is not. Be cautious of a supplier that:

• Describes effects in people, outcomes, or ways of using a material, instead of describing the material and its documentation.
• Hides who tested the material or offers no way to verify a result.
• Is vague about the intended use of what it sells, or about who may buy it.

Research materials are sold for laboratory use. A supplier that blurs that line is telling you something about how it operates.

5. A short checklist

Before you order, you should be able to answer yes to each of these:

1. Is there a named laboratory and a method on the certificate?
2. Does the lot number on the certificate match the lot on the product?
3. Can you see what the supplier does not claim, as clearly as what it does?
4. Are the purchasing restrictions stated plainly before you check out?
5. Does the supplier say what happens when a certificate has not been published yet?

How we approach it

Every certificate we hold is published and searchable by lot or by compound at the certificate index, and a product page links to the certificate for its current lot. Where a certificate has not been published for a product, its page says so instead of showing one. Our quality page explains what we document and how.

Our products are sold for laboratory research use only, to buyers aged 21 or over, and are not for human or veterinary use. You can read the terms of sale and the research-use-only policy before you decide, and browse the catalog when you are ready.

This article is published by Atlantic Longevity, which sells the materials discussed on this site. It is not independent journalism or medical advice. References to laboratory research materials do not establish regulatory approval, clinical effectiveness, or suitability for human administration.