Calcium and cramps - interactions among minerals

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Apparently, mineral intake must be balanced properly. Calcium, iron, zinc,

phosphorus, potassium and magnesium all interact and can interfere with each

other's absorption. Too much of one and too little of others and you can

have problems.

From http://www.nutrition.org/nutinfo/

" Magnesium acts as a calcium antagonist and interacts with nutrients, such

as potassium, vitamin B6, and boron. "

" Other inhibitors of zinc absorption are fiber, polyphenols and a high

intake of calcium. "

" A diet containing a 2:1 dietary ratio of phosphorus to calcium can cause

low blood calcium (hypocalcemia) and secondary hyperparathyroidism with

excess bone resorption and bone loss in animals. "

" Excess calcium supplementation has been associated with some mineral

imbalances such as zinc. "