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Qualitative plot of the effective gut absorption rate as a function of the mass of carbohydrate/glucose in the GUT compartment. While the process of gastric emptying is linear, addition of the saturable gut absorption term, GABSmax, of 1.1 g/min effectively makes the process of gut absorption, and hence meal glucose Ra, nonlinear. At low glucose levels in the gut, the effective gut absorption rate is 0.0097 liter/min.
