It is relevant to note that muscle, joint, and connective tissue pain can be exacerbated by higher intakes of calcium, and especially when large amounts of additional calcium are taken for the purpose of strengthening these tissues. An overabundance of calcium flushes magnesium out of cells, reducing its availability for reducing pain. In addition, this mineral imbalance can significantly compromise the effectiveness both of calcium and magnesium (., because magnesium is needed for the proper uptake and assimilation of calcium) (see more below). If there already exists a state of magnesium depletion in the body (., due to endemically low levels in the diet), then magnesium levels may drop to exceedingly low levels. In such extreme states of deficiency, magnesium simply is not available to block pain effectively, or to fulfill properly its many roles in the body.
Yeast were broken and clarified as described above (17βHSD activity). The 105 000× g cytosolic and membrane/insoluble fractions (20 µg protein) were resolved by SDS gel electrophoresis; Western blotting after transfer to nitrocellulose employed sheep antibody raised against CYP7B (Rose et al ., 2001 ; 1/6000 in phosphate buffered saline, % Tween 20; % milk powder); detection employed peroxidase-labelled rabbit-antisheep Fc antibody (Gibco, 1/32000) and chromogenic staining for peroxidase activity.