[lukan]

Where do you get that from? No, it is the amount of minerals you are recommended to get during one day, no matter the source.

And for Na the recommended ammount is 1.5 g (from D-A-CH)

But in the example linked above, 1 l of the water gives 118 mg of Na, so 13 l of water would be needed to get the required Na amount. Not practical, but most mineral waters actually come rather with an artifically reduced amount of Na. Natural sources probably have higher values.

But in

[f1shy]

The number comes from the NEJM. For low Na diet, 6g Na per day. I do not know any medical association called D-A-CH or any guidelines (Leitlinien or Richtlinien) which are universal for those countries; can you cite better? And 13l of water is not unpractical but poisonous. You just die.

[lukan]

In german:

https://www.dge.de/presse/meldungen/2011-2018/aktualisierte-...

The US FDA says 2300 g max.

https://www.fda.gov/food/nutrition-education-resources-mater...

[f1shy]

Ok Orientierungswert von 6 NaCl g/Tag. Which is 2.3g Na. Back to the beginning: trying to get that from water alone, ni matter how good publicity Eaainger hat, will kill you.

BTW the elefant in the room: getting some less than 2.3 g/day will kill a healthy person relatively quick, while a diet with well above 5g/day will be shedded by healthy individuals without any problem…

[lukan]

"Back to the beginning: trying to get that from water alone, ni matter how good publicity Eaainger hat, will kill you."

Depends on the water. All the water sold or the one from the tap is artifically reduced in Na.

A natural spring might not be and has high values. Or a well in the desert (they can be very salty).