Andy Ho, Straits Times, 20 Mar 10 wrote: ".... the fashionable bottle of drinking water is unlikely to provide the beneficial minerals one can get in our tap water. In fact, if not remineralised, bottled water might, in the long run, even be aggressively bad for our health."
Look at the official water analysis by PUB. No mention is made for magnesium. I reckon if there is any trace element of magnesium in the water, then it must be negligible.
http://www.pub.gov.sg/general/Pages/WaterTreatment.aspx
Hence. Andy Ho's article warning that drinking bottled water could be harmful to our body but public/tap water is practically bereft of magnesium to be of any significance to our daily mineral needs.
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I found some numbers on Mg by PUB Singapore tap water:
ReplyDeleteWater from Choa Chu Kang & Bedok Waterworks Magnesium (as Mg) 1-5 mg/l
Water from Other Waterworks
Magnesium (as Mg) 1-3 mg/l
25 May 2006
http://ibrew.com.sg/forum/viewtopic.php?f=1&t=308&start=30
So the magnesium concentration in public/tap water indeed negligible, like bottled distilled water.