Fucoidan is a unique source of sliminess found only in brown algae. There are several types of fucoidan, such as kombu-extracted fucoidan, wakame (mekabu)-extracted fucoidan, and mozuku-extracted fucoidan. Recent active research on fucoidan has revealed various bioactive functions, including anti-cancer effects, cholesterol-lowering effects, blood pressure-reducing effects, and antiviral activity.

Chemically, fucoidan is a high-molecular-weight polysaccharide composed primarily of sulfated fucose. In addition to fucose, the saccharide chain that constitutes fucoidan includes galactose, mannose, xylose, and uronic acid. The term "fucoidan" does not refer to a substance with a fixed structure but is a general term for high-molecular polysaccharides whose main component is fucose.

Mozuku contains a high amount of fucoidan and offers a much higher extraction efficiency than other brown seaweeds. Mekabu-extracted fucoidan is rich in fucose, galactose, and sulfate. Kombu-extracted fucoidan has a strong slimy texture and notable anti-tumor activity. By combining fucoidan extracted from various types of algae, we can enhance its overall effectiveness.