Seaweeds are brown or green algae that live on or near the sea floor. Bladderwrack is a seaweed belonging to the Fucaceae family that typically grows in cooler, northern climates. Bladderwrack has been used as food, medicine and fertilizer for vegetables dating back centuries. Bladderwrack is one of the highest iodine containing sea vegetables in the world. Bladderwrack may provide nutritive support for health thyroid balance and weight management.