9 out of 10 people have a sea salt deficiency.  I'd be willing to bet on it. 

http://www.shirleys-wellness-cafe.com/Earth/Salt

I also have Dr. David Brownstein's book called Salt Your Way To Health which I've been reading lately.  My serum sodium level was low on last bloodwork done a month ago (which sometimes means nothing) but I really don't think I'm getting enough minerals lately so I'm going to make the Sole water (salt saturated water) and start using it once again.  Haven't used it for 10 years or more and it actually helped a lot of issues I was having at that time.  But it's one of those "easy to do things" that a person forgets about.  Shame on me! 

There are some good online sites with information about this, as well.  I just picked Shirley's because I'm familiar with that site.