Salt is a must-have ingredient, and you'd be hard-pressed to find a kitchen that lacks it. However, if you look closer at your table salt container, you'll notice it probably says something like ...

Back in 1960, most of the world’s population was deficient in the micronutrient iodine, with severe consequences for public health. By 2020, only 21 countries were iodine-deficient – down from 113 in ...