This page compares what is documented about Ipamorelin and Tesamorelin, rather than ranking them by effect. What each molecule is, the sizes and prices actually carried, what the certificate covers, and how the two differ on the bench. Everything here is research-use-only material and we do not publish outcome, dosing or administration content for any compound in the catalogue.
What is Ipamorelin and what is Tesamorelin?
Ipamorelin. Ipamorelin is the selectivity benchmark among growth-hormone secretagogues — the pentapeptide the literature uses when receptor specificity matters.
Tesamorelin. Tesamorelin is a stabilised GHRH(1-44) analogue whose trans-3-hexenoyl modification resists DPP-4 cleavage — a textbook case study in peptide half-life engineering.
How do Ipamorelin and Tesamorelin compare on price and size?
| Ipamorelin | Tesamorelin | |
|---|---|---|
| Sizes carried | 5 mg, 10 mg | 5 mg, 10 mg, 20 mg |
| From | $44.00 | $45.00 |
| Best price per unit | $6.50 / mg | $7.50 / mg |
| Availability | Backordered — waitlist | Backordered — waitlist |
| Certificate | Lot certificate on the product page | Lot certificate on the product page |
| Molecular formula | C38H49N9O5 | C221H366N72O67S |
| Molar mass | 711.9 g/mol | 5,136 g/mol |
| Source | PubChem CID 9831659 | PubChem CID 16137828 |
| Research area | ghrelin-receptor research | GHRH-axis research |
At their best sizes Ipamorelin works out at $6.50 per mg against $7.50 for Tesamorelin — 15% more for the mg. Vial prices start at $44.00 and $45.00 respectively, which is the number most people compare and the one that says least, because the two are not sold in the same sizes. Full sizes, tier pricing and the lot certificate sit on the Ipamorelin page and the Tesamorelin page.
What is each one studied for?
What the published literature investigates, which is a different question from what either will do, and the only one of the two a supplier can answer.
Ipamorelin is studied in ghrelin-receptor research. Ghrelin-receptor pharmacology keeps ipamorelin in constant rotation as the selective reference agonist.
Tesamorelin is studied in ghrh-axis research. GHRH-axis research remains steady, and tesamorelin's engineered stability keeps it the reference analogue in that literature.
Studied in the same area does not make two compounds interchangeable, and the research library holds the per-compound documentation.
Tesamorelin vs Ipamorelin: how they differ on the bench
Tesamorelin. Tesamorelin's stabilising modification is exactly what our identity testing confirms — the unmodified sequence would pass a naive mass check at a glance.
Ipamorelin. Ipamorelin's five residues make it cheap to verify thoroughly; there is no excuse for an unverified vial of something this small.
What actually differs between Tesamorelin and Ipamorelin
Worth doing the arithmetic before comparing sizes: Tesamorelin is 5,136 g/mol and Ipamorelin is 711.9 g/mol, a factor of 7.2. A milligram of Ipamorelin therefore contains roughly 7.2 times as many molecules as a milligram of Tesamorelin, so two vials of the same labelled mass hold quite different amounts of substance. Equal milligrams are not equal moles, which is what the molarity calculator exists to convert, and it is the reason a price-per-milligram comparison and a price-per-mole comparison can point at different vials.
Identity is the other analytical axis, and it is settled per lot rather than per compound. Ipamorelin. Catalogued as Ipamorelin, and the certificate's identity test resolves to that. Tesamorelin. Catalogued as Tesamorelin, and the certificate's identity test resolves to that.
Both are released against a certificate reporting identity, purity by the stated method and net peptide content, readable before anything is bought.
Which is better, Tesamorelin or Ipamorelin?
Neither Tesamorelin nor Ipamorelin is ranked against the other here, and the refusal is deliberate. Better, safer and stronger are questions about effects in a living system, and we sell neither compound for use in one — why none of these pages ranks two compounds sets out the reasoning in full.
What it does instead, for these two:
- Ipamorelin is the cheaper of the two per mg, at $6.50 against $7.50.
- Tesamorelin is the heavier molecule by a factor of 7.2, so equal milligrams are not equal moles.
- Ipamorelin is carried in 2 sizes and Tesamorelin in 3, and each lot carries its own certificate.
Every one of those is checkable before you buy.
Common questions
What is the difference between Tesamorelin and Ipamorelin?
Different molecules before anything else: Tesamorelin is C221H366N72O67S and Ipamorelin is C38H49N9O5. Tesamorelin is a stabilised GHRH(1-44) analogue whose trans-3-hexenoyl modification resists DPP-4 cleavage — a textbook case study in peptide half-life engineering. Ipamorelin is the selectivity benchmark among growth-hormone secretagogues — the pentapeptide the literature uses when receptor specificity matters.
Which one should I choose?
Ipamorelin is carried in 5 mg, 10 mg and Tesamorelin in 5 mg, 10 mg, 20 mg, each lot with its own certificate. Which of those suits the work is yours to decide; everything here is research-use-only rather than guidance for use in a human or an animal.
Do both Ipamorelin and Tesamorelin come with a certificate of analysis?
Neither is in stock at the moment, so in each case the certificate is the one attached to the lot that arrives. A certificate belongs to a lot, not to a product. It is linked from the product page, and reports identity, purity by the stated method, and net peptide content for the material actually in that lot.
Which is cheaper, Tesamorelin or Ipamorelin?
Per mg, Ipamorelin at $6.50 against $7.50, taking each one's best size. By vial they start at $44.00 for Ipamorelin and $45.00 for Tesamorelin, which is the comparison most people make and the one that says least, because the two are not sold in the same sizes.
Is a milligram of Ipamorelin the same as a milligram of Tesamorelin?
By mass yes, by amount of substance no. Tesamorelin is 5,136 g/mol and Ipamorelin is 711.9 g/mol, a factor of 7.2, so a milligram of Ipamorelin holds roughly 7.2 times as many molecules. Two vials with the same number on the label are not the same amount of substance, which is what the molarity calculator converts.
FOR LABORATORY AND IN-VITRO RESEARCH USE ONLY. NOT FOR HUMAN OR ANIMAL CONSUMPTION. NOT FOR PERSONAL, MEDICAL, DIAGNOSTIC, THERAPEUTIC, OR RECREATIONAL USE.