Tesamorelin is the N-terminally modified compound based on 44 amino acids sequence of Growth Hormone Releasing Hormone (GHRH). This modified synthetic form is more potent and stable than the natural peptide. It is also more resistant to cleavage by the dipeptidyl aminopeptidase than human GHRH. It stimulates the synthesis and release of endogenous GH, with an increase in level of insulin-like growth factor (IGF-1). The released GH then binds with the receptors present on various body organs. This regulation is mainly because of the combination of anabolic and lipolytic mechanisms.
 
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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