Ipamorelin vs GHRP-6
Both activate the ghrelin (GHS) receptor. GHRP-6 is a six-residue, first-generation compound. Ipamorelin is a five-residue compound developed later with a more selective profile.
Selective ghrelin-receptor agonist
Choose Ipamorelin if
- ✓ You need a more selective ghrelin-receptor agonist
- ✓ You are comparing newer and older secretagogues
First-generation ghrelin-receptor agonist
Choose GHRP-6 if
- ✓ You want the classic first-generation reference compound
- ✓ You are replicating older GH secretagogue literature
Side-by-side specification
| Compare | Ipamorelin Selective ghrelin-receptor agonist | GHRP-6 First-generation ghrelin-receptor agonist |
|---|---|---|
| Class | Ghrelin-receptor (GHS-R) agonist | Ghrelin-receptor (GHS-R) agonist |
| Research area | GH axis | GH axis |
| Receptor targets | GHS-R1a | GHS-R1a |
| Length | 5 amino acids | 6 amino acids |
| Molecular mass | ≈ 712 Da | ≈ 873 Da |
| Origin | Synthetic | Synthetic, enkephalin-derived |
| Evidence level | 2/5 Mostly animal and in vitro | 2/5 Mostly animal and in vitro |
| Regulatory status | Not approved | Not approved |
| Nordapep from | Not listed | Not listed |
| Best price per mg | Not listed | Not listed |
| View Ipamorelin at Nordapep → | View GHRP-6 at Nordapep → |
What separates them
In the published studies GHRP-6 also affects cortisol, prolactin and feeding behaviour, while ipamorelin shows little effect on cortisol or prolactin. Neither is approved and both rest on small, older human datasets.
Read the full guides for Ipamorelin and GHRP-6, or add a third compound in the comparison tool.
FAQ
Is GHRP-6 the same as GHRP-2?
No. They are related but different six-residue peptides.
Which has more literature?
GHRP-6 has the longer record, but much of it is decades old.
Are Ipamorelin and GHRP-6 approved medicines?
Ipamorelin: Not approved. GHRP-6: Not approved. Research-grade material of either is not a medicine and is supplied for in vitro research only.
Where can I buy Ipamorelin and GHRP-6?
Nordapep lists compounds with a Certificate of Analysis matched to the batch reference. Check each compound page for current availability.
More comparisons
Where to buy
Why we send researchers to Nordapep
Comparing compounds is only half the job. The other half is knowing the vial contains what the label says. Nordapep publishes batch documentation for every compound it sells.
Browse the Nordapep catalogue →Each batch reference on the label matches its CoA, so you can check what is in the vial.
Enter the batch reference from your vial into Nordapep's batch-verification tool.
Purity is reported by RP-HPLC, the standard method for peptides of this size.
Bundled stacks for common comparisons, plus tiered pricing for volume orders.