This page compares what is documented about Ipamorelin and Sermorelin Acetate, 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 Everything here is research-use-only material and we do not publish outcome, dosing or administration content for any compound in the catalogue.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 Sermorelin Acetate?
Ipamorelin. Ipamorelin is the selectivity benchmark among growth-hormone secretagogues — the pentapeptide the literature uses when receptor specificity matters.
Sermorelin Acetate. Sermorelin is GHRH(1-29) — the shortest fully-active fragment of the native hormone, and the baseline compound the whole GHRH-analogue literature builds from.
How do Ipamorelin and Sermorelin Acetate compare on price and size?
| Ipamorelin | Sermorelin Acetate | |
|---|---|---|
| Sizes carried | 5 mg, 10 mg | 5 mg, 10 mg |
| From | $44.00 | $50.00 |
| Best price per unit | $6.50 / mg | $10.00 / mg |
| Availability | Backordered — waitlist | Backordered — waitlist |
| Certificate | Lot certificate on the product page | Lot certificate on the product page |
| Molecular formula | C38H49N9O5 | C149H246N44O42S |
| Molar mass | 711.9 g/mol | 3,357.9 g/mol |
| Source | PubChem CID 9831659 | PubChem CID 16132413 |
| Research area | ghrelin-receptor research | GHRH research |
At their best sizes Ipamorelin works out at $6.50 per mg against $10.00 for Sermorelin Acetate — 54% more for the mg. Vial prices start at $44.00 and $50.00 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 Sermorelin Acetate 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.
Sermorelin Acetate is studied in ghrh research. GHRH research still treats sermorelin as its baseline, with newer analogues defined by how they differ from it.
Studied in the same area does not make two compounds interchangeable, and the research library holds the per-compound documentation.
Sermorelin vs Ipamorelin: how they differ on the bench
Sermorelin Acetate. Unmodified sermorelin is the most degradation-prone of the GHRH family we stock — the trade-off for being the native sequence. Storage discipline matters most here.
Ipamorelin. Ipamorelin's five residues make it cheap to verify thoroughly; there is no excuse for an unverified vial of something this small.
On naming, because the two are written several ways and the difference is not always obvious: Sermorelin Acetate is also written sermorelin. They refer to the same materials described here, and the certificate for a lot uses the name on this page. The comparison itself is usually typed Ipamorelin vs Sermorelin.
What actually differs between Sermorelin Acetate and Ipamorelin
Worth doing the arithmetic before comparing sizes: Sermorelin Acetate is 3,357.9 g/mol and Ipamorelin is 711.9 g/mol, a factor of 4.7. A milligram of Ipamorelin therefore contains roughly 4.7 times as many molecules as a milligram of Sermorelin Acetate, 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. Sermorelin Acetate. This product is the acetate salt, so a lot certificate reports the salt rather than the free peptide figures above.
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, Sermorelin or Ipamorelin?
Neither Sermorelin 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 $10.00.
- Sermorelin Acetate is the heavier molecule by a factor of 4.7, so equal milligrams are not equal moles.
- Both are carried in 2 sizes, and each lot carries its own certificate.
Every one of those is checkable before you buy.
Common questions
What is the difference between Sermorelin Acetate and Ipamorelin?
Different molecules before anything else: Sermorelin Acetate is C149H246N44O42S and Ipamorelin is C38H49N9O5. Sermorelin is GHRH(1-29) — the shortest fully-active fragment of the native hormone, and the baseline compound the whole GHRH-analogue literature builds from. 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 Sermorelin Acetate in 5 mg, 10 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 Sermorelin Acetate 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, Sermorelin Acetate or Ipamorelin?
Per mg, Ipamorelin at $6.50 against $10.00, taking each one's best size. By vial they start at $44.00 for Ipamorelin and $50.00 for Sermorelin Acetate, 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 Sermorelin Acetate?
By mass yes, by amount of substance no. Sermorelin Acetate is 3,357.9 g/mol and Ipamorelin is 711.9 g/mol, a factor of 4.7, so a milligram of Ipamorelin holds roughly 4.7 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.