Tirzepatide is a dual agonist that combines: GLP-1 (glucagon-like peptide-1) activity GIP (glucose-dependent insulinotropic polypeptide) activity This combination creates a stronger incretin effect, improving insulin sensitivity and appetite control more effectively than GLP-1 medications alone
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Large peptides cannot cross intact skin: molecules the size of semaglutide do not passively diffuse through the skin barrier the way small drugs such as nicotine can
The addition of GIP receptor activation, combined with powerful GLP-1 action, slows down stomach emptying and intestinal transit more profoundly than single-agonist medications, giving food and gas significantly more time to linger and ferment
Pharmacological Reviews, 2010 Jun, Volume 62 (Issue 2), Pages 199236
DermaVue recommends Mounjaro as first-line for most patients, with semaglutide reserved for those with specific clinical indications, budget constraints, or thin-fat phenotype without significant insulin resistance