Raising the World’s I.Q.

RAWALPINDI, Pakistan

Fred R. Conrad/The New York Times

Nicholas D. Kristof

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Travelers to Africa and Asia all have their favorite forms of foreign aid to “make a difference.” One of mine is a miracle substance that is cheap and actually makes people smarter.

Unfortunately, it has one appalling side effect. No, it doesn’t make you sterile, but it is just about the least sexy substance in the world. Indeed, because it’s so numbingly boring, few people pay attention to it or invest in it. (Or dare write about it!)

It’s iodized salt.

Almost one-third of the world’s people don’t get enough iodine from food and water. The result in extreme cases is large goiters that swell their necks, or other obvious impairments such as dwarfism or cretinism. But far more common is mental slowness.

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.

Development geeks rave about the benefits of adding iodine and other micronutrients (such as vitamin A, iron, zinc and folic acid) to diets. The Copenhagen Consensus, which brings together a panel of top global economists to find the most cost-effective solutions to the world’s problems, puts micronutrients at the top of the list of foreign aid spending priorities.

“Probably no other technology,” the World Bank said of micronutrients, “offers as large an opportunity to improve lives ... at such low cost and in such a short time.”

Yet the strategy hasn’t been fully put in place, partly because micronutrients have zero glamour. There are no starlets embracing iodine. And guess which country has taken the lead in this area by sponsoring the Micronutrient Initiative? Hint: It’s earnest and dull, just like micronutrients themselves.

Ta-da — Canada!

(Years ago, New Republic magazine held a contest for the most boring headline ever. The benchmark was from a Times Op-Ed column — not mine — that read “Worthwhile Canadian Initiative.” Alas, that’s salt iodization!)

Pakistan is typical of the challenges. Until recently, 6 in 10 Pakistani schoolchildren were iodine-deficient. Iodine just wasn’t on anyone’s mind.