Sermorelin, originally referred to as GHRH (1-29), is a 29 amino acid peptide derived from the first 29 amino acids of the endogenous peptide hormone, growth hormone-releasing hormone (GHRH). Sermorelin is a synthetic peptide derived from an endogenous hormone called growth hormone-releasing hormone (GHRH). Similar to GHRH, sermorelin exerts its effects in the pituitary gland by binding to somatotroph cells leading to secretion of growth hormone.
 
Ipamorelin is a pentapeptide, meaning that its structure is comprised of five amino acids. It is a GH secretagogue, and is considered to be an agonist, meaning that it possesses the ability to bind certain receptors of a cell and provokes a cellular response. Ipamorelin’s operational mechanics enables the peptide to stimulate the production of pituitary gland-based expression of secretions related to growth amongst animal test subjects. At the same time, the presence of the peptide has been shown to inhibit the production of a secretion known as somatostatin. 

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