Assuming high potency as the starting point, very low and variable oral bioavailability are therefore the main reasons that there are so few current FDA-approved oral formulations of peptides for systemic delivery (Table 1)
In addition, aggregation as a result of the solubilization step is a common problem, resulting in false positives (Szidonya et al., 2008)
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Another study comparing tirzepatide with semaglutide in diabetes patients showcased tirzepatide's superiority in glycated hemoglobin reduction and more significant body weight loss
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