fetuses. A study in Ecuador suggests that iodine deficiency typically shaves ten to fifteen points off a child’s IQ. Worldwide, iodine deficiency alone reduces humanity’s collective IQ by more than 1 billion points. According to one estimate, just $19 million would pay for salt iodization in poor countries that need it. This would yield economic benefits that another study found were nine times the cost. The result is that while salt iodization
