Habitat & Cultivation : Bladderwrack is native to the North Atlantic shores and western Mediterranean, and is harvested all year.
Part Used : Whole plant.
Constituents : Bladderwrack contains polyphenols, polysaccharides and minerals, especially iodine (up to 0.1%). The polysaccharides are immune-stimulant. The iodine may stimulate the thyroid gland.
History & Folklore : Bladderwrack has been employed as a fuel, as a winter feed for cattle and as a source of iodine and potash.
Medicinal Actions & Uses : Due to its iodine content, bladderwrack is taken as an anti-goitre remedy. The plant appears to raise the metabolic rate by increasing hormone production by the thyroid gland, though this increase may be limited to poorly functioning thyroids. Bladderwrack is reputedly helpful in rheumatic conditions.