Preventable Stupidity Common In The UK
A study involving more than 700 teenage girls at nine UK centres found more than two-thirds had a deficiency.
Experts say the problem stems from children drinking less milk, which is a good source of iodine.
Nearly 70% of the samples revealed an iodine deficiency and nearly a fifth (18%) of samples showed very low iodine levels, below 50μg/L rather than the acceptable minimum of 100μg/L.
Iodine deficiency is the most common cause of preventable mental impairment worldwide producing typical reductions in IQ of 10 to 15 IQ points.
That explains a lot.