Ipamorelin: The Selective GH Secretagogue

Ipamorelin sits in a different category from most of the catalog: it’s not a hormone, it’s a signal — a pentapeptide that tells the pituitary to release the body’s own growth hormone.

The molecule

Ipamorelin (C₃₈H₄₉N₉O₅, ≈ 712 g/mol) is a ghrelin-mimetic designed for high selectivity at the growth-hormone secretagogue receptor (GHS-R). Where full-length HGH is the final product of the GH axis, ipamorelin works one step earlier — stimulating endogenous release. That’s the distinction researchers care about, and it’s covered in depth in the Ipamorelin vs HGH 191aa comparison.

Reconstitution

The 5 mg vial follows standard peptide math:

• 5 mg = 5,000 µg
• 2 mL bacteriostatic water → 2,500 µg/mL
• A 250 µg dose = 10 units on a U-100 syringe

The reconstitution calculator has the ipamorelin preset. Storage is −20 °C lyophilized, 2–8 °C after reconstitution per the COA.

Research context

As a selective GHS-R agonist, ipamorelin appears in receptor selectivity and GH pulse dynamics research. See Ipamorelin for CAS, purity and full specifications.

For laboratory research use only. Not medical advice.