The iodine added to salt is not a food. It is suggested that you always get your vitamins and minerals from food. They are not the same when you get it from a chemical. Also there may be other nutrients required besides iodine. So I suggest eating a food.
Eat the sea vegetable or seaweed, kelp. It is a food and has lots of iodine. It is also an herb, vegetable and a botanical. But watch out for the side effects. It is a food but that is what you call other effects of drugs. So its side effects include helping overweight people to lose weight and anti-aging. But that may be due to helping the thyroid.
There are other health benefits like protecting you from breast cancer. And men can get breast cancer. Men do not have breasts but they do have a breast. Women have 2 breasts and they also have a breast.
The islands of Okinawa and Japan are the 2 countries with the longest living people in the world. Since they are surrounded by sea and also they have one-third the population of the U.S. on a tiny island, they get lots of food from the sea. For example sushi has seaweed and may have fish.
Vegetables from the sea are loaded with trace minerals that are missing in the soil. Can you give me one example? One example is iodine. Everyone should eat kelp for health. See this
webpage about the health benefits of kelp. Selenium and zinc are not foods.