Posted by Paul (128.230.9.134) on February 27, 2000 at 10:27:09:
In Reply to: Food for thought posted by Todd on February 27, 2000 at 08:45:23:
Todd, you are correct about Mg being a competitive inhibitor for Ca channels. However, I would have to disagree with your statement that "Mg is primarily a intracellular and skeletal ion." Free Mg is found both intracellular at~1mM and inside cells at about the same free concentration. Total [Mg] inside the cells is much higher due to Mg being bound up in many enzyme complexes (Na/K ATPase for example). I did not quite understand your meaning about Mg absorption. The more one absorbs, the more deficient one is?? Did you mean that the more you take, the less you absorb? That I can understand.