This is very interesting Don, thank you very much. I've been on the ER4YT since 1/5/02, and for about 3 weeks eating ER/Paleo. I was using Celtic Sea salt in water, in salad dressings, etc., up until about a week ago. I stopped it because It competes with magnesium for absorption. I'm a little un-balanced mineral wise right now, and the Celtic salt was preventing me from picking up magnesium and I was getting palpitations, muscle twitching, etc. I think I'll use the Celtic salt to de-ice the driveway from now on :-) Kind Regards, Joseph R. New Hampshire USA