I signed on to ask this and laughed when I saw the sugar thread. I'm crazily craving salt - drinking tomato juice, eating salt and vinegar chips, putting extra salt on salads, drinking carbonated water in addition to normal water... What good thing am I missing in my diet?
It could be trace minerals. The quality of salt one uses is important. Using a celtic sea salt provides you with the saltiness and a wealth of trace minerals particularly calcium. This is a nice one and available in most HFSs.
It could also be a sign of needing more water. Sometimes the body will crave salt when it needs water. This happened to me a couple of months ago - I was really craving salty stuff and when I paid attention I was NOT drinking enough water. This is baby #4 you'd think I'd know to drink more water, but I was busy and not paying enough attention I guess!