Correlation does not necessarily mean causation. In this case, ground water low in calcium and magnesium indicates the soil is low in available calcium and magnesium. As positive ions (cations) in a soil test, calcium should be around 75% of your available cations and magnesium around 10 to 12%. When they are low, you can expect calcium and magnesium deficiencies in the food produced and calcium and magnesium deficiencies in the people or animals eating it. To suggest adding calcium or magnesium to drinking water is to not understand how we should get our calcium and magnesium, through nutrition.
Hi Albedo:
I wasn't saying that if you have osteoporosis that you shouldn't be taking calcium supplements. I would suggest that when you take a calcium supplement you keep track of the calcium content of your urine. You will probably find the calcium content of you urine will increase when you take a calcium supplement. This indicates the calcium was digested and absorbed but did not enter into nutritional service in your body. If taking calcium solved osteoporosis then the people living on the white cliffs of Dover would have the best teeth and skeletons.
To learn more about osteoporosis you might want to learn what our bodies need to make use of the minerals we ingest and what bones are made of. It won't be easy.
There are a LOT of links in that article about Magnesium, showing the relation of magnesium to calcium.
One says that one needs about twice the magnesium to calcium ratio, for calcium to enter the bones. Otherwise it gets into soft tissue, building that painful prickly feeling in the heel, for instance.
We learned this, and my wive's calcium deposits in her feet actually dissolved by adding magnesium, and the pain went away.
calcium to magnesium relativity to osteoporosis-information
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