Bladderwrack grows in the intertidal zone and is a short, leafy plant with air bladders. This seaweed is a very well balanced brown seaweed and provides a good source of vitamins, minerals and trace elements needed to live a healthy life. It is more often used in health and beauty applications. Nutritional Values: Packed with vitamin K, C, protein, iodine, bromine, phosphorus, and high amounts of magnesium. Culinary Uses: It is best used in body care products and supplements.