正常細胞分裂時，不會超出組織或器官的範圍，但癌細胞是失去正常程序的細胞，因此，癌細胞會隨著血液或淋巴系統侵襲其他器官。當癌細胞由原發部位擴散至其他組織或器官，這種現象叫做「轉移」。 癌細胞的特點是當新生血管形成後，腫瘤的生長速度會迅速加快。通過各種實驗觀察證明，當癌細胞注射褐藻糖膠後，生長速度受到抑制，有效阻止腫瘤增大和轉移的機會。2004年7月，在加拿大舉行的「第十二屆國際免疫學會議」中，研究人員發表了相關論文，通過實驗證明，褐藻糖膠能夠抑制人體臍帶中的血管內皮細胞管腔形成。並指出海蘊(Mozuku)提取的褐藻糖膠和裙帶菜孢子葉(Mekabu)提取的褐藻糖膠均具有抑制癌細胞新生血管形成的效果。 When normal cells divide, they do not exceed the range of tissues or organs, but cancer cells are cells that have lost their normal procedures. Therefore, cancer cells invade other organs along with the blood or lymphatic system. When cancer cells spread from the original site to other tissues or organs, this phenomenon is called “metastasis.” The characteristic of cancer cells is that when new blood vessels are formed, the growth rate of tumors will increase rapidly. Various experimental observations have proved that when cancer cells are injected with fucoidan, their growth rate is inhibited, effectively preventing the chance of tumor growth and metastasis. In July 2004, in the “Twelfth International Conference on Immunology” held in Canada, researchers published related papers, which proved through experiments that fucoidan can inhibit the formation of vascular endothelial cells in the human umbilical cord. It is also pointed out that both the fucoidan extracted from Mozuku and the fucoidan extracted from Mekabu spores (Mekabu) have the effect of inhibiting the formation of new blood vessels in cancer cells.