Calcium is the most potent germanium antagonist, with phosphorus being synergistic with germanium, while magnesium is the most potent silicon antagonist, with sodium being synergistic with silicon. This mutual calcium-germanium and magnesium-silicon antagonism however only takes place at close to normal levels. As calcium levels become excessively high, they will progressively inhibit germanium absorption to a point where supplementation of even larger amounts of germanium will no longer result in increased levels, neither will germanium be able to lower calcium any longer... Full Text