Arthur
Honorary Master
It's a myth that your body needs the "minerals in water"....water is depraved of minerals.
...RO systems has a ceramic filter the adds minerals to the filtered water to stop this process.
Your body can only metabolise organically bound minerals, ie those in plants and animals. The minerals in solution in water pass straight through the body - or they cause damage by lodging in eyes, for example.
It's almost impossible to find the truth on the internet because so many sites regurgitate the false info retailed by the water-pushers. Not being a biochemist, I eventually had to contact several top water scientists to get to the bottom of this. All three insisted that the best water was pure distilled water such as clean rainwater, which has no minerals.
