Unrefined sea salt contains trace amounts of algae. Iodized salt contains iodine. And table salt, Kosher salt and other types contain anti-caking agents that can degrade over time, leading to ...

But after iodine supplements were shown to help prevent them, iodised salt was "rolled out" in 1924. By the 1940s, goiters had all but "vanished". Now, thanks to complacency, changing diets and a ...