Bladderwrack is a brown seaweed packed with iodine and trace minerals. People use the dried herb, powder, or extract to help keep the thyroid running smoothly. Iodine is a building block for thyroid hormones, which influence your metabolic rate and energy. Results hinge on your existing iodine levels.
High iodine content is the main concern. Bladderwrack can throw off thyroid medications such as levothyroxine or antithyroid drugs and may require a doctor to adjust your dose. Taking it alongside lithium raises the risk of lithium toxicity. Get a professionals guidance before you start.