* Liquid Herbal Extract * Fucus vesiculosus * Mature Fertile Thallus * Herbal Dietary Supplement We prepare our Bladderwrack Extract from the seaweed, Fucus vesiculosus, which is Custom Wildcrafted in its native Pacific Ocean habitat. To assure optimal extraction of Bladderwrack"s bioactive compounds, the mature fertile thallus is hand-harvested, carefully shade-dried and then thoroughly extracted. Our Bladderwrack is never fumigated or irradiated.