Sermorelin

Sermorelin (also written GHRH 1-29 amide) is a lab-made peptide (a short chain of amino acids, the building blocks of proteins) made of 29 amino acids. It copies the active front part of a natural body hormone called GHRH (growth hormone-releasing hormone, the hormone that tells the pituitary gland to release growth hormone). In studies it is described as the shortest piece of GHRH that still works fully, and it has been used both as a test to check how the pituitary gland is working and as a research stand-in for GHRH.

How it works

Sermorelin switches on the GHRH receptor (the docking point on cells that GHRH normally acts through), found on the growth-hormone-making cells of the pituitary gland (a small gland at the base of the brain). Turning it on is studied for triggering the natural, on-and-off release of the body's own growth hormone [1]. Because it acts one step upstream, on the pituitary gland itself, researchers have used it to study whether the brain-pituitary control loop is intact, rather than giving growth hormone directly [1].

What researchers have studied it for: the growth hormone and IGF-1 system

Studies have measured how much growth hormone the body releases in response to sermorelin, using this as a fairly specific sign of how much reserve the pituitary gland has. They reported a quick rise in growth hormone after it was given into a vein in study groups [1]. This has been used in research to describe the growth hormone and IGF-1 system (IGF-1 is a growth signal triggered by growth hormone) and to tell apart problems in the pituitary gland from problems in the brain [1].

What researchers have studied it for: diagnosis and hormone research

A review of clinical study data described sermorelin's use as a test agent to help check for growth hormone shortage in selected groups of children, noting it gave fewer false-alarm results than some other tests [1]. Studies frame it as a research and diagnostic reagent for studying the body's hormone control system.

What the research hasn't shown yet

The published findings come from controlled diagnostic and clinical studies in selected groups. The research does not show that this compound is safe or effective for any one person who buys it, and no benefit to the buyer is implied. Sermorelin is supplied by K4 Elite only as a reference compound for laboratory and test-tube research, not for any other use.

In laboratory settings the lyophilized peptide is typically reconstituted with bacteriostatic or sterile water to the desired concentration. Store the lyophilized powder at -20°C, keep reconstituted solution at 2-8°C, minimize freeze-thaw cycles, and protect from light to preserve peptide integrity.