Yes -- thanks everyone for clarifying -- the Iodine isn't a toxin and we definitely need salt.
I could be totally off on this but I wonder if the reason Inositol hexaniacinate keeps coming up is because of something I heard from Dr oz (Oprah doc and the heart surgeon who did Pres Clinton's by-passes).
He said that when he put patients on niacin supplements to lower cholestrol that something like 90% of patients showed signs of niacin toxicity in their liver. My understanding is that Inositol hexaniacinate isn't processed in the same way as the other niacin derivates.
From mothernature.com: "A variation on niacin, called inositol hexaniacinate, is also available in supplements. Since it has not been linked with any of the usual niacin toxicity in scientific research, some doctors recommend inositol hexaniacinate for people who need large amounts of niacin."
Also, for what it's worth, a few days after I had these bad salt cravings I had what I can only assume was a gallbladder attack. Painful painful painful. A quick search would indicate that excess Iodine is also sent to the gallbladder for excretion.
All in all it's some interesting stuff but I'll continue down the path to healthiness nonetheless ;) best, steph.