A COA is the difference between knowing what you have and hoping. Most people never actually read one — here's how, including how to check ours.
A certificate of analysis is a laboratory report stating what a product is and how pure it is. To read one properly, check six things: the product name matches what you ordered, the batch number matches the number printed on your vial, the date is recent, HPLC purity is 98% or higher, identity is confirmed by mass spectrometry, and the testing lab is genuinely independent rather than the seller's own bench. HPLC and mass spectrometry answer different questions — purity and identity — so a COA showing only one of them is half a document.
Last updated: August 2026 · For research use only · Not medical advice
The research-peptide market isn't regulated like the pharmaceutical one. Quality varies enormously between suppliers, and nothing about a label guarantees what's inside the vial.
The first thing at stake is money. An under-dosed, degraded or counterfeit product means a research block that produces nothing, plus the cost of buying again properly. People routinely blame a compound for not working when the real problem was that they never had it.
The second is safety, and it's the more serious one. Anything intended for injection has to be sterile and pure. A product carrying endotoxins, contaminants or a different compound than the label claims is a genuine physical risk — and no discount compensates for that.
The base rule is simple: if you can't verify what a substance is and who tested it, you're buying blind. Everything below exists so you don't have to.
| What to check | What good looks like | What should worry you |
|---|---|---|
| [object Object] | The exact peptide name, matching what you ordered | A vague or generic product description |
| [object Object] | Matches the batch number printed on your vial | A COA from a different batch — it tells you nothing about yours |
| [object Object] | Recent, and consistent with the batch you received | An old certificate recycled for current stock |
| [object Object] | 98% or higher; 99%+ is what you want to see | Below 95%, or no purity figure at all |
| [object Object] | Mass spectrometry confirming the molecular weight matches | Missing entirely — purity alone doesn't prove what it is |
| [object Object] | An independent third-party lab, named and contactable | "In-house analysis" with no external verification |
HPLC and MS answer different questions. HPLC measures how pure the sample is; mass spectrometry confirms it's actually the declared peptide. Something can be 99% pure and still be 99% of the wrong molecule — which is why you want both.
Any document can be edited in minutes, so the real test is confirming it independently:
| Signs of a serious supplier | Signs to walk away from |
|---|---|
| Third-party testing per batch, published and verifiable | No COA at all, or one generic certificate reused across products |
| A traceable track record and consistent feedback over time | Prices well below the market — usually under-dosed, fake or expired |
| Transparency about sourcing, shipping and storage | Urgency and pressure tactics — "last units", buy now |
| A clear policy if an order arrives wrong or damaged | Only irreversible payment methods with no recourse |
| Answers technical questions directly, without dodging | Irritation or silence when you ask for documentation |
A supplier who becomes uncomfortable when asked for a batch COA has already answered the most important question.
A serious supplier answers all of these without friction — including us:
The physical product tells you something too:
We publish this guide knowing it will be used to scrutinise us, which is the point. Novapep products are supplied with third-party laboratory analysis, and you're welcome to ask for the certificate covering the batch you're being sent before you commit to anything.
If a supplier — us included — can't produce a batch-specific certificate from an independent lab, that should end the conversation. The whole market improves when buyers ask harder questions, and we'd rather compete on documentation than on being the cheapest option available.
Message us for the COA relevant to your batch, and check it using the six points above.
A COA is a laboratory report stating a product's identity and purity for a specific production batch. It should name the peptide, cite the batch number, show a recent test date, report HPLC purity, confirm identity by mass spectrometry, and come from a named independent laboratory you can contact.
Look for 98% or higher, with 99%+ being what a good supplier typically returns. Anything under 95% is a warning sign. Bear in mind purity is only half the picture — it tells you how clean the sample is, not whether the molecule is the one you ordered.
HPLC measures purity — what proportion of the sample is the main compound. Mass spectrometry confirms identity by matching molecular weight to the declared peptide. You need both, because a sample can be highly pure and still be the wrong substance entirely. A COA with only HPLC is incomplete.
Find the report number and check it directly with the issuing laboratory — via their verification page, a QR code, or by emailing them the reference. Then confirm the product, batch and date on the certificate match what's printed on your vial. A PDF or photo on its own can be edited in minutes.
Not on its own. In-house results are the seller assessing their own product, which is useful as a supplement but not as proof. Third-party testing comes from an independent laboratory with no stake in the sale, which is why it's the standard worth insisting on.
No batch-specific COA, one generic certificate reused across products, in-house testing only, prices far below market, "pharmaceutical grade" claims with no documentation, no batch number on the vial, and pressure to pay quickly using methods with no recourse. Any one of these is reason to pause.
This page is educational consumer-protection information and does not constitute medical, pharmaceutical or legal advice, nor a recommendation to use or dose any substance. All products supplied by Novapep are lab-tested and intended for research use only — not for human or veterinary consumption. Check the regulations that apply in your country.
Message us and we'll send the third-party analysis covering the batch you're being supplied.