Milk and dairy products are the main source of iodine in many diets, and an important iodine source in many countries. However, the latest research from Dr. Sarah Bath (University of Surrey) found that the iodine concentration of most alternatives to cows’ milk – such as soy and almond “milk” – is very low. This matters because deficiency of iodine, especially during pregnancy, affects brain development and is linked to lower intelligence.