Update: I’ve written substantially more on iodine at http://www.gwern.net/Nootropics#iodine (Covering background, children/adult IQ studies, meta-analysis, power calculations, and value of information.)
Update: I’ve written substantially more on iodine at http://www.gwern.net/Nootropics#iodine (Covering background, children/adult IQ studies, meta-analysis, power calculations, and value of information.)