Sourcing research tesamorelin in Canada: what a certificate of analysis does and does not tell you

Start with the distinction that matters more than anything else on this page, because almost every guide to buying this compound skips it.

Tesamorelin is a synthetic analogue of growth hormone-releasing hormone, and it is an approved drug. It is licensed as Egrifta by the FDA in the United States and by Health Canada, for the reduction of excess visceral abdominal fat in patients with HIV-associated lipodystrophy. That is a real registration, built on human trials in that population, for that indication.

It is licensed for that indication and nothing else. And the material sold as a research chemical is not that product. It is not Egrifta, it is not manufactured to the licence, it is not prescribed, it is not dispensed by a pharmacist, and it is supplied for laboratory use only. The approval belongs to a specific product with a specific chain of custody. None of it transfers to a vial bought from a research supplier, however pure that vial turns out to be.

Everything below is about how to establish what is in the vial. That is a narrower question than whether the compound works, and it is the only one a supplier can actually answer.

Purity is a number about one batch

A vial at 95% and a vial at 99% are not the same material with a rounding difference between them. The useful question is what the remainder is.

The realistic candidates: truncated or deletion sequences from incomplete synthesis, aggregated peptide, residual synthesis reagents and counter-ions, heavy metal traces, and degradation products accumulated in storage and transit. Some of those are inert in an assay. Some are not, and a few will produce an effect of their own — which is the worst case, because it looks like data.

This is why third-party analysis matters and in-house analysis does not. A supplier testing its own product is reporting on itself.

Reading a certificate of analysis

Ask for the COA before buying, not after. A complete one covers seven things.

Batch or lot number. The COA describes one batch. If the number on the certificate does not match the number on the vial, the certificate is about someone else's material.

HPLC purity. Chromatographic purity as a percentage, with the trace itself rather than just the figure. The trace shows where the impurities sit; the number alone hides that.

Mass spectrometry. Molecular weight confirmation — evidence the compound is tesamorelin and not a different peptide of similar purity. Purity without identity is a statement that the vial contains 99% of something.

Assay or peptide content. Quantification of actual peptide by weight against the label — a vial marked 10 mg containing 10.2 mg of peptide, say. Lyophilised peptide includes salts and residual water, so content and purity are separate measurements and a high purity figure does not imply the labelled mass is present.

Endotoxin. Measured in EU/mg. Bacterial endotoxin is the impurity that most reliably confounds an in vivo result without appearing in a purity figure at all, which makes it the test most worth insisting on for material destined for parenteral use in animal work. Under 5 EU/mg is the figure usually quoted.

Microbial testing. Absence of bacterial and fungal growth.

Laboratory and analyst. Named accredited third-party laboratory — Janoshik Analytical is the one most commonly used in this market — with a signature, credentials and a registration number.

What a COA cannot tell you

Worth stating plainly, because COAs get treated as proof of more than they establish.

A COA describes a sample from one batch at one moment, tested by a laboratory the seller chose and paid. It says nothing about the vial in your hand unless the lot numbers match. It says nothing about how the material was handled after testing — a correctly synthesised peptide that spent a week in a warm vehicle is still correctly synthesised and no longer intact. And it says nothing whatsoever about whether the compound does anything, which is a question for the literature, not the laboratory.

Verify the report independently where the testing laboratory offers it. A report key checked against the laboratory's own portal is evidence. A PDF supplied by the seller is a PDF.

Red flags

• No COA, or a COA promised after purchase
• In-house testing only
• A generic COA with no batch number, or one that does not match the vial
• HPLC without mass-spec identity confirmation
• Reported purity below 98%
• 'Pharmaceutical grade' asserted with no testing standard named — the phrase has no agreed meaning in this market
• Marketing that implies the material is the approved medicine, or that attaches the Egrifta indication to a research chemical
• No verifiable company information, business registration or contact details

That second-to-last one is the specific risk with this compound. Tesamorelin's approval makes it unusually easy to blur the line, and a seller willing to blur it is telling you how it handles every other claim.

Evaluating a Canadian supplier

Domestic supply avoids a border crossing, which removes both a delay and a temperature excursion of unpredictable length. Beyond that, four things are checkable.

Registration. Look up the corporate number. Registered businesses are findable.

Laboratory relationship. Which third-party laboratory, named, and consistently across batches.

Batch traceability. Can a given lot be traced to the manufacturer, and can the COA be verified without going through the seller?

Transparency. Published COAs rather than COAs on request. Publishing is the harder commitment and the more informative one.

At NovaEvum, tesamorelin ships with a Janoshik report carrying a verifiable key, with traceable batch numbers.

Storage and handling

Laboratory technique for a lyophilised cake, nothing more.

Add bacteriostatic water slowly down the vial wall rather than spraying it onto the cake, and let it dissolve on its own over a minute or two. Do not shake. Peptides denature at the air-liquid interface, and foam is lost material you cannot account for.

Beyond that, follow your institution's own protocols. Any work in a living system needs approval from the relevant ethical review board before it starts, not after.

Tesamorelin is supplied here as Tesamorelin. Janoshik-verified by HPLC with mass-spec identity confirmation; 100% synthetic. The measured purity for each lot is stated on its product page. For laboratory research use only.

Common questions

Tesamorelin is an approved drug — can I buy the research version instead of a prescription? No. Egrifta is a licensed medicine supplied through a prescription for one indication, HIV-associated lipodystrophy. Research-grade tesamorelin is a laboratory chemical: not that product, not prescribed, not dispensed, and not sold for human use. The two are not substitutes and the approval does not reach across.

Is 99% purity enough? It depends on the remaining 1%. A single truncated sequence at 1% is a different problem from 1% endotoxin-bearing bacterial residue. This is the argument for reading the chromatogram and the endotoxin figure rather than only the headline number.

Does a COA prove the vial I received is good? It proves a sample from that lot tested to those specifications on that date. Check the lot number against your vial, verify the report with the laboratory rather than the seller, and remember that transport and storage after testing are not covered by it.

How far does the human evidence go? For the licensed product, to registration trials in people with HIV-associated lipodystrophy — that population, that indication. Outside it the published record is far thinner, and none of it applies to research-grade material, which has no clinical evidence base of its own.

All products sold by NovaEvum are for research and laboratory use only. They are not intended for human or animal consumption, diagnosis, treatment, cure, or prevention of any disease.