..and they do it by drinking all that glacial runoff too, which is derided as being so undesirable to have in a supplement (e.g., "inorganic minerals", etc.). I find that interesting..
Plants and plant material growing in/under the ice, spare me.. Tell me a glacier doesn't grind rocks.. Which do you reckon there's more of in there?
It doesn't seem to be creating any health problems for *them*..