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  • Title: Influence of magnesium on the absorption and excretion of calcium and oxalate ions.
    Author: Berg W, Bothor C, Pirlich W, Janitzky V.
    Journal: Eur Urol; 1986; 12(4):274-82. PubMed ID: 3743598.
    Abstract:
    In two test series additional oxalic acid excretion in urine was induced in healthy test persons by administering a spinach diet. This additional excretion could be markedly reduced by magnesium administration. Calcium and citrate excretions are largely unaffected by magnesium administration. Magnesium excretions, however, are clearly increased. The calcium oxalate crystallization rates in the 5-or 7-hour urines reveal a behavior parallel to that of the oxalic acid excretion profile. In the control urines, the crystal picture is characterized by numerous medium-sized whewellite crystals. In contrast, in the test series weddellite crystals are reduced in size and frequency after magnesium administration. New aspects of magnesium effects must be discussed; above all the possible absorption changes resulting from gastrointestinal diseases.
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