Calcium in bottled water is ranging up to around 500 mg/l with most waters containing below 100mg/l. The average daily requirement of calcium is approximately 800 mg. Babies require less, 15- to 19-year olds require substantially more. Calcium is multi-talented: it stabilizes bone structure, teeth and cell membranes, it ensures transmission of impulses in the nerves and muscles, and it fulfils important functions to prevent blood clotting. Calcium has a balancing effect for numerous skin allergies. If the body does not have an adequate supply of calcium there is decalcification of the bones (osteoporosis): the risk of fracture increases.
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