Bladderwrack is a seaweed that is high in iodine, magnesium, and vitamin C. While the evidence is far from conclusive, advocates believe that supplementary bladderwrack will aid in the treatment of thyroid disorders, inflammation, heartburn, anxiety, and other conditions.
Bladderwrack may also be used topically to soothe sore or itchy scalp. As a result, it is now used as a natural ingredient in a variety of products.