[DanBC]

Ultra pure water will leach salts from the body. This is dangerous.

At least, that's what people suggest, I don't know if it's true.

[tankenmate]

It's called hyponatraemia; check it out at wikipedia http://en.wikipedia.org/wiki/Hyponatraemia

[tankenmate]

A downvote for a pure statement of fact?

[midas007]

It's not dangerous at all if there is sufficient salt balance in the diet.

Heck, I drink DI water on a daily basis and have a low sodium diet replaced by potassium salt where possible.