Normal magnesium in the plasma is 0.8. ~ 1.05mmol / L, hypomagnesemia is a condition that serum magnesium is less than 0.75mmol / L. Plasma magnesium in the form of three kinds of existence. 1. free magnesium: about 55% or more; 2. magnesium complex: In order to re-carbonate and magnesium, phosphate, such as the formation of the complex, accounting for about 15%; 3. magnesium protein binding: The main and albumin binding, accounting for about 30%.
In the organization of the magnesium content of muscle tissue the highest, accounting for about a nuclear cell magnesium content of about 80%. At the time of acute magnesium deficiency, muscle plasma magnesium is low and little change in magnesium content, but the chronic lack of magnesium, plasma magnesium can be normal and to reduce the magnesium content of muscle. magnesium deficiency when the erythrocyte magnesium concentration decreased muscle early and erythrocyte magnesium and therefore reflect the in vivo can be used as an important indicator of magnesium deficiency. magnesium absorption by the intestinal tract, mainly excreted by the kidneys. thyroid Su-, growth hormone, parathyroid hormone and vitamin can promote intestinal and renal absorption of magnesium, with the opposite role of aldosterone. insulin has to promote the role of magnesium into the cells.
Magnesium has many important physiological functions, such as magnesium are cell metabolism Many of the activator enzyme system, is to maintain the helix structure of DNA and the structure of ribosomal particles required for the integrity and magnesium for the maintenance of normal cardiac metabolism and myocardial excitability have an important role.