This is my understanding too. There are microscopic amounts of trace elements here or there but in reality none of them add up to anything meaningful compared t

This is my understanding too. There are microscopic amounts of trace elements here or there but in reality none of them add up to anything meaningful compared to what you get from food, multivitamins, or other less ideal means. Rather if they did there'd be probably quite a lot of concern. Not sure where that old wive's tale came from but even my parents had similar concerns against filtered water ages ago.