Op-Ed Columnist - Raising the World’s I.Q. - Kristof:CARE works on things like this.
...When a pregnant woman doesn’t have enough iodine in her body, her child may suffer irreversible brain damage and could have an I.Q. that is 10 to 15 points lower than it would otherwise be. An educated guess is that iodine deficiency results in a needless loss of more than 1 billion I.Q. points around the world...
Occasionally in my travels I’ve been unnerved by coming across entire villages, in western China and elsewhere, eerily full of people with mental and physical handicaps, staggering about, unable to speak coherently.
I now realize that the cause in some cases was probably iodine deficiency...
I sometimes have to remind them once a year not to spam me or contact me, but some years they don't need a reminder. They have my email and contact information on a special "do not call" list.
No junk mail, no spam, no hassles. We send them a check every December.