Good times seaweed is 4.5 grams, and there are 3 pieces in it. The heat of seaweed is not very high, about 100 grams of seaweed is 177 calories. Seaweed can be used as diet food, but more sugar and essence will be added in the production process of seaweed, which is not conducive to human health for a long time. The iron contained in seaweed can help the body replenish blood and prevent iron deficiency anemia.