Sea moss, or Irish moss, is a sea vegetable that grows on rocks close to shore. Popular for its anti-viral properties, it’s been used throughout world for decades. For some cultures,, it’s become the standard method in helping those suffering from malnutrition.  

Bladderwrack is used for thyroid disorders including:

underactive thyroid(myxedema) 
over-sized thyroid gland (goiter) 

iodine deficiency