Does the saturable component only make a difference at intakes greater than 100 micrograms per day (g/day)?
The non-linearity observed in the intake/uptake relationship from the IEUBK model may be more obvious at higher intake rates (i.e., 100 g/day or more), but this is only because the equation for a rectangular hyperbola defines the observed curve. At low doses, the relationship is still non-linear, but it is not as obvious.