Interesting that you are not a salt-waster, but sometimes show the same characteristics as a salt-waster. My daughter who turned 12 just yesterday is a non salt-waster too; however, she sometimes craves salty foods and whenever it is very hot (like it has been here in VA for the last several days) she has a hard time coping with the heat. She will perspire excessively and then feel very bad. Same thing when she plays sports and really exerts herself. Dr. has said that although not a salt waster, she probably loses more than a normal amount of salt when sick/stressed. We give salty snacks, Gatorade, and sometimes an extra dose of her hydrocortone. It seems to work. I have never understood why she is like this if she is a non salt waster, but your explanation makes a lot of sense to me. Thanks for your post!