Nori is the most commonly used edible seaweed. It is the seaweed usually used in sushi and other Japanese dishes. Though nori has less iodine than other types of seaweeds, it is still an excellent source of iodine, as well as vitamin B12. Our nutrient-rich Nori Seaweed Instant Miso Soup is one of the easiest ways to enjoy authentic and healthy miso soup. Just add hot water!