Of course I have a true story for this thread.. But first some facts:
Yes, Mineral buildup OVER TIME will foul filters (Fairly quickly in some cases) and pressure regulators and check valves.. If that is you have check valves, However a good pressure regulator (Watts) is easily cleaned and re-built, Check valves likewise and you should be replacing filers far more often anyway.
That said: Your body is used to the water where YOU LIVE,, You go somewhere else and the water is different... This,, can have an effect on your body.
The true story: This is one of the reasons the main selling point on the Motor home I'm sitting in right now was the floor plan.. A bath and a half.. 2 holes, No waiting.
When we go somewhere different, the different water can make that 2nd hole reall nice.