Seaweed is more than just the perfect addition to your ramen, it also contains an essential mineral called iodine. Iodine is used in the body to aid in proper thyroid function. Patients of Dr. Zenhausern who have underlying thyroid issues tend to struggle with losing weight. "Your thyroid health is a huge component of your metabolism," said Dr. Zenhausern. Because seaweed contains iodine, it's no wonder that it has been called the ocean's superfood.