I guess this is being downvoted because of this 2002 study, vs the Japanese studies? http://www.freedrinkingwater.com/water_heal/medical1/1-water-hardness-and-k

I guess this is being downvoted because of this 2002 study, vs the Japanese studies? http://www.freedrinkingwater.com/water_heal/medical1/1-water-hardness-and-kidney-stones.htm http://www.freedrinkingwater.com/water_heal/medical1/1-water... "Any correlation between water hardness, or the drinking water calcium or 14 magnesium level, and the incidence of urolithiasis was not found in the last vast USA epidemiological study with 3270 patients (Schwartz et al, 2002). The quoted Japanese studies did not find that the water calcium or magnesium levels alone had an effect on the incidence of urolithiasis but did find that the Mg to Ca ratio had: ..."