Which drink contains iodine, which is fundamentally important for the body's metabolism?

Explanation

With the domestication of the cow, which also produces milk outside lactation periods, humans gained access to a large amount of milk. Normally, people who have passed puberty cannot tolerate milk, as the enzyme lactase, which is necessary to break down lactose, is only found in children. Most populations in Europe and the Middle East (where livestock farming has been common for many centuries) have (through genetic changes) developed the ability to retain lactase throughout their lives and can thus enjoy milk and dairy products as adults. Cow's milk also contains iodine.