Fucoidan contained in brown sea weeds had a power to perish cancerous cells. Also other researchers announced following other effects of fucoidan :-

1) Anti coagulating effect of blood.

2) Resisting the outbreak of cancerous cells

3) resisting viruses

4) suppressing ellergy

5) Adjusting enterogastric tract

6) lowering blood cholesterol

7) Anti-oxidant effect

8) anti-inflammatory effect in the skin and so on.