Water cannot do its thing without salt. Salt is number 3 on the list of things you can't live without. 1 and 2 are air and water. I suspect that if you do not take salt (preferably unprocessed sea salt) the body will break down the calcium in the bones to get at the salts they contain. I've done a lot of research on dehydration but have not seen this correlation anywhere. It is merely my suspicion due to the relationship between chronic dehydration combined with low salt intake teachings and the epidemic of osteoporosis. It is suspected that over 75% of people in the US are chronically dehydrated which means that 75% of the human bodies in the US are operating in emergency, water rationing mode. Sipping doesn't count and neither do other liquids. The body does not process other liquids the same way it processes plain water on an empty stomach. Water is used by every system in the body. Including the process it must go through to steal water from the colon. My personal rule of thumb is that any liquid that is not plain water belongs to the colon.