Fucose is an essential sugar only present in nature, in some mushrooms and brown algae cell walls. Fucoidans are high molecular weight polysaccharides (50 to 1000k Dalton) of partially sulfated fucose, forming the skeleton of the algae. Through a hydrolysis process, fucoidans are brought to an extremely low molecular weight while saturating the fucose molecules with sulfated groups. A combination of mono, di- and trimers of sulfated fucose with a molecular weight under 2 kDa, is finally obtained. This is Fucoreverse.