Certain forms of biosynthetic insulin are absorbed more rapidly than regular human insulin because

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The amino acid sequence of the insulin molecule has been altered to allow more rapid absorption. Certain forms of biosynthetic insulin, like rapid-acting insulin analogs, have been developed with altered amino acid sequences to increase their absorption rate and onset of action. Zinc or other substances like acetate or protamine may also be added to insulin to alter its absorption rate, but these are not the primary reasons for the more rapid absorption of certain biosynthetic insulin forms. Additionally, insulin cannot be administered orally via slow-release or sustained-release preparations as it would be broken down by digestive enzymes before it could be absorbed into the bloodstream.

Certain Forms of Biosynthetic Insulin Are Absorbed More Rapidly Than