Figure

Intestinal magnesium (Mg) absorption. In rats, the intestinal Mg absorption is related to the luminal Mg concentration in a curvilinear fashion (A). This same phenomenon has been observed in humans (B and C). The hyperbolic curve (dotted ¡ine in B and C) seen at low doses and concentrations may reflect a saturable tran-scellular process; whereas the linear function (dashed ¡ine in B and C) at higher Mg intake may be a concentration-dependent passive intercellular Mg absorption. Alternatively, an intercellular process that can vary its permeability to Mg, depending on the luminal Mg concentration, could explain these findings (see Fig. 4-7) [13-15]. (A, From Kayne and Lee [13]; B, from Roth and Wermer [14]; C, from Fine and coworkers [15]; with permission.)

Mechanism of intestinal magnesium absorption

Nucleus

Mechanism of intestinal magnesium absorption

Nucleus

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