fucoidan 100%extracted from Laminaria japonicia good for kidney disease curing Fucoidan is extracted from the Laminaria japonicia. The product, which is hydrosoluble heteropolysaccharide, mainly consists of sulfuric ester- Fucose, and also have little quantities of galactose, Mannose, xylose, arabinose, saccharic-aldehyded acid. So it's also called algin or fucoidan & laminaran, the major ...