Ipamorelin: What It Is and What It Does

What Ipamorelin is

Ipamorelin is a small lab-made pentapeptide (five amino acids) that acts as a selective growth-hormone secretagogue — a molecule that prompts the body to release its own growth hormone. It is supplied as an analytical-grade reference material for laboratory research.

What it does — in plain terms

Your body releases growth hormone in pulses, set off by 'go' signals. Ipamorelin mimics one of those signals — the ghrelin pathway — by binding the growth-hormone secretagogue receptor (GHS-R1a) on cells in the pituitary and prompting a pulse of growth hormone. What made it notable in the research is its selectivity: the foundational 1998 study described it as the first secretagogue to release growth hormone about as cleanly as the body's own GHRH, without meaningfully raising cortisol, prolactin, or other hormones even at doses far above the effective dose. That clean, targeted action is why it is a common tool for studying how the growth-hormone system is switched on, and it has also been examined in bone-growth and pharmacokinetic research.

Here's where Ipamorelin actually shows up in the published research:

• How the pituitary releases growth hormone in pulses
• Selective GH secretagogue signaling at the ghrelin receptor (GHS-R1a)
• Longitudinal bone growth in animal models
• Pharmacokinetics and endocrine research

Reconstitution reference

Standard laboratory reconstitution volumes for Ipamorelin, from the VNG Reconstitution Sheet. See the full reconstitution guide for the method and concentration math.