Peptide Library

Activates the GHRH receptor on the pituitary, stimulating growth hormone synthesis and release; with DAC the stimulus is continuous, without DAC it produces a short pulse

Triggers a pulse of growth hormone with little effect on cortisol or prolactin.

Activates the pituitary GHRH receptor to stimulate synthesis and pulsatile release of the body's own growth hormone

Stimulates the pituitary GHRH receptor to increase pulsatile growth hormone release, which raises IGF-1 and preferentially mobilises visceral (deep abdominal) fat

Mimics ghrelin at pituitary and hypothalamic receptors to release a large pulse of growth hormone, and also raises cortisol, ACTH and prolactin and stimulates appetite

Activates the ghrelin receptor in the pituitary and hypothalamus, releasing a pulse of growth hormone; also raises appetite, cortisol and prolactin

Releases a large pulse of growth hormone via the ghrelin receptor; the most potent injectable GHRP, but also raises cortisol and prolactin and desensitises with repeated use

Activates the IGF-1 receptor like native IGF-1 but barely binds the IGF-binding proteins that normally buffer it, so more stays free and active for longer

Proposed to activate muscle satellite (stem) cells and delay their differentiation, expanding the pool available for repair — through a receptor that has never been identified

Traps myostatin and activin before they can reach their receptors, removing a brake on muscle growth and altering reproductive and metabolic signalling

Acts on the GHRH receptor in the pituitary to trigger a pulse of growth hormone; the four substitutions slow enzymatic clearance so the pulse is larger and longer than with native GHRH

Mimics ghrelin at the pituitary and hypothalamus to release a pulse of growth hormone, with the GHRP-6-type side effects on appetite, cortisol and prolactin

Mimics ghrelin to release a pulse of growth hormone from the pituitary; like hexarelin it also produces small rises in prolactin, ACTH and cortisol

Binds the GH receptor on liver, muscle, bone and fat; drives IGF-1 production and acts directly to promote growth, protein synthesis, fat breakdown and reduced insulin sensitivity

Activates the IGF-1 receptor like IGF-1 but binds far more weakly to IGF-binding proteins, so more of it is free and active — roughly 10 times as potent as IGF-1 in cell culture

Signals through the IGF-1 receptor and the A isoform of the insulin receptor to promote growth and survival, while a third receptor (IGF2R) mops it up; in adults it is mainly a fetal and tissue-level growth factor rather than a GH-driven…

Mimics ghrelin to trigger a measured pulse of growth hormone from the pituitary; a weak pulse indicates GH deficiency

Activates the natriuretic peptide receptor B (NPR-B) on growth-plate cartilage cells, raising cGMP, which switches off the overactive FGFR3–MAPK signalling that stops bone growth in achondroplasia