This page compares what is documented about GHRP-2 and Ipamorelin, 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 Everything here is research-use-only material and we do not publish outcome, dosing or administration content for any compound in the catalogue.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 GHRP-2 and what is Ipamorelin?
GHRP-2. GHRP-2 is a synthetic growth hormone secretagogue peptide, one of a small family of short sequences developed for that receptor and studied since the 1990s.
Ipamorelin. Ipamorelin is the selectivity benchmark among growth-hormone secretagogues — the pentapeptide the literature uses when receptor specificity matters.
How do GHRP-2 and Ipamorelin compare on price and size?
| GHRP-2 | Ipamorelin | |
|---|---|---|
| Sizes carried | 5 mg, 10 mg, 15 mg | 5 mg, 10 mg |
| From | $45.00 | $44.00 |
| Best price per unit | $5.33 / mg | $6.50 / mg |
| Availability | Backordered — waitlist | Backordered — waitlist |
| Certificate | Lot certificate on the product page | Lot certificate on the product page |
| Molecular formula | C45H55N9O6 | C38H49N9O5 |
| Molar mass | 818 g/mol | 711.9 g/mol |
| Source | PubChem CID 6918245 | PubChem CID 9831659 |
| Research area | secretagogue pharmacology | ghrelin-receptor research |
At their best sizes GHRP-2 works out at $5.33 per mg against $6.50 for Ipamorelin — 22% more for the mg. Vial prices start at $45.00 and $44.00 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 GHRP-2 page and the Ipamorelin 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.
GHRP-2 is studied in secretagogue pharmacology research. The secretagogue family is small, well-characterised and consistently cited, which makes it a useful reference set for analytical method work.
Ipamorelin is studied in ghrelin-receptor research. Ghrelin-receptor pharmacology keeps ipamorelin in constant rotation as the selective reference agonist.
Studied in the same area does not make two compounds interchangeable, and the research library holds the per-compound documentation.
Ipamorelin vs GHRP 2: how they differ on the bench
Ipamorelin. Ipamorelin's five residues make it cheap to verify thoroughly; there is no excuse for an unverified vial of something this small.
GHRP-2. Short synthetic sequences are cheap to make and easy to substitute, so purity and identity data are the difference between a reagent and a guess.
On naming, because the two are written several ways and the difference is not always obvious: GHRP-2 is also written ghrp 2. 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 GHRP 2 vs Ipamorelin.
What actually differs between Ipamorelin and GHRP-2
Worth doing the arithmetic before comparing sizes: GHRP-2 is 818 g/mol and Ipamorelin is 711.9 g/mol, a factor of 1.1. A milligram of Ipamorelin therefore contains roughly 1.1 times as many molecules as a milligram of GHRP-2, 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.
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, Ipamorelin or GHRP 2?
Neither Ipamorelin nor GHRP 2 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:
- GHRP-2 is the cheaper of the two per mg, at $5.33 against $6.50.
- GHRP-2 is the heavier molecule by a factor of 1.1, so equal milligrams are not equal moles.
- GHRP-2 is carried in 3 sizes and Ipamorelin in 2, and each lot carries its own certificate.
Every one of those is checkable before you buy.
Common questions
What is the difference between Ipamorelin and GHRP-2?
Different molecules before anything else: Ipamorelin is C38H49N9O5 and GHRP-2 is C45H55N9O6. Ipamorelin is the selectivity benchmark among growth-hormone secretagogues — the pentapeptide the literature uses when receptor specificity matters. GHRP-2 is a synthetic growth hormone secretagogue peptide, one of a small family of short sequences developed for that receptor and studied since the 1990s.
Which one should I choose?
GHRP-2 is carried in 5 mg, 10 mg, 15 mg and Ipamorelin 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 GHRP-2 and Ipamorelin 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, Ipamorelin or GHRP-2?
Per mg, GHRP-2 at $5.33 against $6.50, taking each one's best size. By vial they start at $45.00 for GHRP-2 and $44.00 for Ipamorelin, 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 GHRP-2 the same as a milligram of Ipamorelin?
By mass yes, by amount of substance no. GHRP-2 is 818 g/mol and Ipamorelin is 711.9 g/mol, a factor of 1.1, so a milligram of Ipamorelin holds roughly 1.1 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.