Where to buy tesamorelin: when you compare tesamorelin for sale, choose a supplier that names its laboratory, prints the theoretical mass and puts the lot number on the vial. Tesamorelin is a 44-residue synthetic analog of growth-hormone-releasing hormone, 5,135.9 Da, code TH9507. The research vial is not the approved medicine. LabFirst lists 3 sizes from $45.
- Tesamorelin is sold at LabFirst in 5mg, 10mg, 20mg from $45, cheapest per mg in the 20mg vial at $7.50.
- The identity reference for Tesamorelin is 5132.717 Da monoisotopic (C221H366N72O67S), PubChem CID 16137828.
- A complete certificate carries identity by mass spectrometry, purity by HPLC with method and date, and net content in milligrams, all for the lot printed on the vial.
- LabFirst lots are tested by Kovera Labs, an independent laboratory, and each lot's certificate is published on its product page and in the certificate index once the report is back.
- Ground Advantage shipping is $15 flat under $200 and free above, US only; volume tiers are 10% at ten vials of one size and 15% at twenty.
What does "tesamorelin peptide" name, and what does it not?
Tesamorelin is the full 44-residue human GHRH sequence, amidated at the C-terminus, with one addition: a trans-3-hexenoyl group on the N-terminal tyrosine that protects the chain from the enzyme that clips native GHRH. Theratechnologies developed it under the code TH9507; formula C221H366N72O67S, average mass 5,135.9 Da, supplied as the acetate. Listings write tesamorelin, tesamorelin acetate, tesamorelin peptide and TH9507. It is the longest GHRH-family peptide in the catalog, fifteen residues longer than sermorelin and Mod GRF, and correspondingly more expensive to make and to characterize.
An approved medicine, Egrifta, contains tesamorelin. The research vial is not that product. Egrifta is manufactured under an approval to a specification and released against it; a research vial is a synthetic peptide with the same sequence sold as laboratory material and standing on its lot certificate. No equivalence is claimed here and none is possible from a certificate, which measures a lot and not a manufacturing process. Sellers who write "same as Egrifta" are borrowing a reputation the powder has not earned.
Chemically the points that matter to a buyer are the hexenoyl group and the methionine. The hexenoyl adds 96 Da to the bare GHRH(1-44) amide, so a lot without it, which is cheaper to make, weighs 5,040 Da and is a different compound. The methionine at position 27 oxidizes, adding 16 Da, and a 44-mer has several asparagine and glutamine residues that deamidate. The clinical papers cited below describe the drug; this page describes the material, not any use.
The reference point for identity is public. PubChem lists Tesamorelin as CID 16137828 with molecular formula C221H366N72O67S, an average molecular weight of 5136 Da and a monoisotopic mass of 5132.717 Da. Those are the numbers a mass spectrometer is checked against, and the number a certificate must print beside the observed mass.
In plain terms: A man-made copy of growth-hormone-releasing hormone (GHRH). What is sold here is a research chemical, not a drug product. Listing it is not an approval and not a claim that it is equivalent to or a fit substitute for any medicine.
- Lot on the vial matches the certificate
- Laboratory named, with its own lookup
- Theoretical mass printed and correct
- Purity has a method and a date
- Net content stated in milligrams
Tesamorelin for sale: which size is cheapest per mg?
LabFirst lists Tesamorelin in 3 sizes (5mg, 10mg, 20mg) from $45 to $150, priced per vial with the per-mg figure beside it so sizes can be compared without arithmetic. Per mg, the 20mg vial is the cheapest at $7.50 and the 5mg the dearest at $9, which is the usual shape: the vial, stopper, seal, fill and laboratory run cost the same whatever mass goes in.
| Size | Price | Per mg | 10 units | 20 units | Availability |
|---|---|---|---|---|---|
| 5mg | $45 | $9 | $405 ($8.10/mg) | $765 ($7.65/mg) | In stock (9), lot LF-28A-2609 |
| 10mg | $80 | $8 | $720 ($7.20/mg) | $1360 ($6.80/mg) | In stock (10), lot PO-1001-TSM10 |
| 20mg (best per mg) | $150 | $7.50 | $1350 ($6.75/mg) | $2550 ($6.38/mg) | In stock (10), lot PO-1001-TSM20 |
The volume tiers are per size, not per basket: ten vials of one size take 10% off that line and twenty take 15%, and mixed sizes do not combine. Ground Advantage shipping is a flat $15 on orders under $200 and free from $200, within the United States only, with same-day dispatch on orders placed before 12 PM Pacific on a business day. The cost per mg tool runs the same comparison across any two listings, ours or anyone else's.
Forty-four residues plus an N-terminal acylation is a long, expensive synthesis with a demanding purification, and tesamorelin is priced accordingly; it is the dearest GHRH-family peptide per milligram in the catalog. The per-milligram figure falls across the 5, 10 and 20 mg vials for the usual reason, the vial, the fill and the laboratory run being fixed costs spread over more mass. A laboratory qualifying a lot buys the 5 mg vial once and reads its certificate for the hexenoyl mass and the sulfoxide peak before buying larger.
The price trap is the des-hexenoyl peptide. GHRH(1-44) amide without the hexenoyl group is cheaper to make and 96 Da lighter, and it appears under the tesamorelin name at prices that look like a discount. The observed mass on the certificate is the only defense. The only discounts on this page are the volume tiers, per size and unchanged month to month, and the lot on the vial is whatever the certificate index says on the day.
What should a Tesamorelin certificate show?
Three tests answer three different questions, and a certificate of analysis for Tesamorelin is only complete when it carries all three for the exact lot on the vial. Identity is settled by mass spectrometry, and the number to look for on a Tesamorelin certificate is 5132.717 Da monoisotopic (or 5136 Da average, if the laboratory reports the deconvoluted average mass). The observed mass should sit within the instrument's stated tolerance of that figure, and the certificate should print both the theoretical and the observed value, not just a tick.
Purity is a separate question, answered by HPLC: how much of what came off the column was the compound. The figure is only interpretable with its method beside it (column, gradient, detection wavelength) and a date, which is what ICH Q2(R2) means when it asks that an analytical procedure be shown fit for its purpose. A percentage with no method and no date is a number somebody typed, and a certificate that carries every test but for a different lot number than the vial is the most common failure of all and the easiest to catch. Net content is the third test and the one most often missing: the milligrams of Tesamorelin in the vial, measured, against the size printed on the label.
Identity is the deconvoluted mass against 5,135.9 Da average (about 5,132.7 Da monoisotopic), with the certificate saying which it reports. The electrospray envelope runs from about 4+ to 8+ (m/z 1,285, 1,028, 857, 735 and so on) and a laboratory that prints it beside the deconvoluted value has shown its work. Two wrong answers are worth knowing: about 5,040 Da is GHRH(1-44) amide without the hexenoyl group, a different and cheaper peptide; a mass 16 Da high is the methionine sulfoxide, which as a small named peak is honest aging and as the main peak is a degraded lot.
Purity by HPLC on a 44-mer is a resolution problem: the des-hexenoyl form, the sulfoxide, deamidated forms and truncated sequences all elute near the main peak, so the chromatogram with its column, gradient and wavelength is the evidence and the percentage only its summary. Net content is the line that pays on a peptide this expensive: quantitative HPLC against a standard or amino acid analysis tells you how many of the labeled milligrams are peptide rather than acetate, trifluoroacetate and water, and on a 20 mg vial the gap is routinely a fifth of the price. The counter-ion belongs beside that figure.
Where should you buy Tesamorelin? Five checks before you order
Every seller of tesamorelin peptide says "third-party tested". The phrase costs nothing. These five checks take about four minutes per listing and separate a tested lot from a tested-sounding one.
- The lot on the vial is the lot on the certificate. Read the printed lot number, then open the certificate and match it. A certificate for "Tesamorelin" with no lot, or a lot that does not match, describes some other vial.
- The laboratory is named and has its own lookup. The report should come from a laboratory the seller does not own, with a search code you can enter on the laboratory's own site. LabFirst lots are tested by an independent laboratory and the laboratory's report is published for each lot; anything that exists only as the seller's own summary has not been verified.
- The theoretical mass is printed, and it is the right one. For Tesamorelin that is 5132.717 Da monoisotopic; a certificate that prints a different figure has either measured a different molecule or copied a template.
- Purity has a method and a date. An HPLC percentage should name the method and the run date. A figure that reads "99%+" with neither, or one date reused across every product a seller lists, is decoration.
- Net content is stated in milligrams. The label size is a claim; the certificate's net content is the measurement. If the certificate has no net content line, the purity figure describes the powder, not the vial, and the price per mg you calculated is fiction.
How listings for Tesamorelin specifically mislead:
- "Same as Egrifta" or "pharmaceutical grade". Egrifta is an approved product with a release specification; a research vial has a lot certificate and nothing else, and no equivalence is claimed or possible.
- A price far below the market for a 44-residue acylated peptide. The cheap version is usually GHRH(1-44) amide without the hexenoyl group, 96 Da lighter on the certificate and a different compound.
- A certificate with one rounded mass and no spectrum. A 5,136 Da molecule gives a charge-state envelope that must be deconvoluted; a bare number with no trace could describe anything.
- "99.9%" with no sulfoxide or deamidation peaks named. A 44-mer with a methionine ages in known ways; a certificate that never sees those peaks may never have looked.
How do I verify a LabFirst Tesamorelin lot?
The Tesamorelin sizes in stock today carry lots LF-28A-2609 and PO-1001-TSM10 and PO-1001-TSM20. Lot LF-28A-2609 is at the laboratory for identity, purity and net content. Until the report is attached the product page says "pending verification" against that lot and makes no purity claim; the price stands and the report goes live the day it arrives, on the page and at /coa/.
Verification runs through the laboratory, not through us. Open the certificate index, find the lot, and read the laboratory's report; it is the laboratory's own document, not ours, and the laboratory will confirm it against its records.
The product page reads the live stock feed on load (stock, lot and certificate state for every size), so what you see when you order is what ships. The lot is printed on the label and encoded in the QR patch on its right-hand side; scanning it opens that lot's record.
How should Tesamorelin be stored, and how does it ship?
Lyophilized and sealed at 2 to 8 C out of light, tesamorelin holds for the shelf period on the certificate. Its weaknesses are named residues: methionine 27 oxidizes in air and light, several asparagines and glutamines deamidate in solution, and the tryptophan makes light exposure matter; all three are slow in the dry cake and faster once water is present. The sealed cake's other enemy is water drawn from humid air once the vial is opened: open a vial once, for its purpose, and never re-seal one for storage.
Orders ship within the United States, Ground Advantage at a flat $15 under $200 and free above it, same day when placed before 12 PM Pacific on a business day, and the shipping page states the cutoff, the carriers and what is and is not promised.
The record a laboratory keeps on arrival is what makes the certificate usable later, and it is short:
- the lot number as printed on the vial, and the certificate's accession or search code beside it;
- the date received and the condition of the seal;
- the storage location and temperature it went into;
- the number of vials, and later the date each one was opened and by whom.
A Tesamorelin vial with that record behind it can be traced from the bench to the laboratory report in one step; without it, the certificate is a document about a vial that can no longer be identified.
What is the regulatory status of Tesamorelin?
Tesamorelin is the active ingredient of an approved medicine, Egrifta (2010), from Theratechnologies. That approval belongs to that product and its manufacturing and confers nothing on a research vial: the material sold here is not made under it, is not tested to its specification and is offered as laboratory material only, with no claim that it is equivalent to, as pure as, or a substitute for any medicine. There is no USP monograph for the bulk peptide that a research lot could claim to meet, and the existence of an approved product is, if anything, a reason to read the lot certificate more carefully, since it is the only evidence a research vial has.
FOR LABORATORY AND IN-VITRO RESEARCH USE ONLY. NOT FOR HUMAN OR ANIMAL CONSUMPTION. LabFirst sells Tesamorelin to laboratories and researchers as material for in-vitro work, gives no guidance on use, and ships only against that understanding. Nothing on this page or on the product page describes preparing or administering anything.
Bottom line
Buy tesamorelin against a certificate for the lot on the vial, with the observed mass beside 5,135.9 Da average or 5,132.7 Da monoisotopic, a purity figure with its method and date, and net content in milligrams. A mass near 5,040 Da is the cheaper des-hexenoyl peptide under the same name. The research vial is not Egrifta, and it is sold for laboratory research use only.
What is Tesamorelin studied for?
Published research on Tesamorelin investigates the areas below, which is a different question from what Tesamorelin will do for anyone, a claim about a living system that nothing on this site is sold for.
What it is. A man-made copy of growth-hormone-releasing hormone (GHRH).
What the research looks at. There is a registered clinical record, and an approved medicine containing tesamorelin exists under its own brand name for one specific condition.
How it is thought to work. It works on the GHRH receptor. It is a hardier copy of the hormone that triggers growth hormone, rather than growth hormone itself, which matters: it acts one step earlier in the chain.
What is not established. What is sold here is a research chemical, not a drug product. Listing it is not an approval and not a claim that it is equivalent to or a fit substitute for any medicine.
The full record, including the certificate for the lot in stock, is on the Tesamorelin product page.
Common questions
Where can I find tesamorelin for sale online?
How much does Tesamorelin cost?
Is research tesamorelin the same as Egrifta?
Which Tesamorelin size should a laboratory order first?
How do I check that a Tesamorelin certificate is real?
How does tesamorelin differ from sermorelin on a certificate?
Published certificates for Tesamorelin
Every figure below is read from a report the laboratory issued for that lot; each page carries the PDF and the lab's own verification link.
More procurement guides
Sources
- PubChem, Tesamorelin, CID 16137828. Public record for the molecular formula (C221H366N72O67S), average molecular weight (5136 Da) and monoisotopic mass (5132.717 Da) quoted here as the identity reference.
- Stanley and colleagues, Effect of tesamorelin on visceral fat and liver fat in HIV-infected patients with abdominal fat accumulation: a randomized clinical trial, JAMA . Primary description of the compound in the literature; supports the class and naming stated here, not any use.
- Friedman and colleagues, Growth hormone-releasing hormone effects on brain gamma-aminobutyric acid levels in mild cognitive impairment and healthy aging, JAMA Neurology . Primary description of the compound in the literature; supports the class and naming stated here, not any use.
- ICH Q2(R2), Validation of Analytical Procedures (2023) . Why a purity figure is only interpretable with its method, and what "fit for purpose" means for the HPLC and mass spectrometry results a certificate reports.
