Mechanism of Action (How Ipamorelin Works)
Ghrelin Receptor (GHS-R1a) Activation: Binds selectively to ghrelin receptors in the pituitary and hypothalamus, triggering GH release [Raun 1998].
Increases GH Pulsatility: Produces rapid, dose-dependent GH spikes without significantly altering cortisol or prolactin [Raun 1998].
Stimulates IGF-1 Production: GH pulses result in hepatic IGF-1 synthesis, driving anabolic effects [Svensson 2000].
Promotes Lipolysis: Enhances fat breakdown by increasing GH-dependent hormone-sensitive lipase activity [Malmlof 2001].
Minimal Endocrine Disruption: Selective for GH secretion with low risk of elevating ACTH or prolactin [Raun 1998].
References
Raun K, Hansen BS, Johansen NL, et al. European Journal of Endocrinology. 1998;139(5):552-561.
https://academic.oup.com/ejendo/article/139/5/552/6748390Svensson J, Lall S, Dickson SL, et al. Journal of Endocrinology. 2000;165(3):569-577.
https://joe.bioscientifica.com/downloadpdf/view/journals/joe/165/3/569.pdfAndersen NB, Malmlöf K, Johansen PB, et al. Growth Hormone & IGF Research. 2001;11(5):266-272.
https://www.sciencedirect.com/journal/growth-hormone-and-igf-research/vol/11/issue/5Penarrubia J, Gálvez M, Pavía J, et al. Journal of Clinical Endocrinology & Metabolism. 1994;79(2):456-461.
Teichman SL, Neale A, Lawrence B, et al. Journal of Clinical Endocrinology & Metabolism. 2006;91(3):799-805.https://academic.oup.com/jcem/article/79/2/456/2650652?utm_source=chatgpt.com
https://academic.oup.com/jcem/article-abstract/91/3/799/2843281




