I would rather believe that the so-called "mineral water" being beneficial to health is a conspiracy theory, a conspiracy woven by experts, mineral water producers, the media and other stakeholders. Anyway, as long as there is no conclusion from a scientific investigation, I will continue to drink barrelled purified water. Considering that one day the heavy metals in food may exceed the standard, I guess I won't be lacking in any elements (the WHO's report is so detailed, it even writes about what metal elements tap water pipes will dissolve at what pH levels, everyone should take some time to read it), so I might as well drink more purified water for now!