Swanson Standardized Bladderwrack Extract helps awaken your thyroid with iodine-rich marine bladderwrack. Iodine stimulates the thyroid gland, which is responsible for producing hormones that regulate metabolic functions. But the thyroid is not alone in its need for iodine—every organ needs a daily dose to operate at peak capacity. Swanson Standardized Bladderwrack Extract capsules deliver a guaranteed 150 mcg of iodine in each capsule.