Bladderwrack is a type of seaweed. People use the whole plant to make medicine.
Bladderwrack is used for many conditions, but, so far, there isn’t enough scientific evidence to determine whether or not it is effective for any of them. It’s also important to note that it’s not safe to take a bladderwrack by mouth.
Bladderwrack is used for thyroid disorders including underactive thyroid (myxedema), over-sized thyroid gland (goiter), and iodine deficiency. It is also used for obesity, arthritis, joint pain, “hardening of the arteries” (arteriosclerosis), digestive disorders, heartburn, “blood cleansing,” constipation, bronchitis, emphysema, urinary tract disorders, and anxiety. Other uses include boosting the immune system and increasing energy.