How a compound in seaweed fights cancer and prevents metastasis

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wakame(NaturalHealth365) Japan has some of the longest life expectancy averages in the world, and some of the lowest incidences of chronic diseases common in the western world. One of the most critical factors to their good health is the regular consumption of brown seaweed, rich in a compound known as fucoidan.

Fucoidan has been the subject of over 1,000 studies, and is known to have a number of health benefits, from suppressing inflammation to promoting immunity. One of the most encouraging effects of fucoidan, however, is its ability to slow the spread of cancer.

Editor’s note: If you want to eat seaweed (daily) but, you’re concerned about radiation in food that comes from Japan … try Maine Coast Sea Vegetables.  It’s delicious and top-notch!

Inhibiting cancer cell movement

Fucoidan is actually the general term applied to a group of molecules that can be extracted from several seaweed species, although Undaria pinnatifida is perhaps the most well-known source. Numerous scientific studies have shown that fucoidan has the ability to stop cancer cells from spreading throughout the body by inhibiting molecules known as selectins.

The primary function of selectins is to facilitate the physical interaction and movement of various types of cells. The problem, however, is that cancer cells can take advantage of these molecules in spreading throughout the body. But fucoidan has been shown to prevent cancer cells from adhering to blood vessel walls and spreading.

Avoiding the dangers of metastasis

The spread of cancer cells, or cancer metastasis, often leads to deadly complications for cancer patients. While an initial cancerous tumor is dangerous and often life-threatening in itself, the spreading of this cancer to distant areas of the body through metastasis is often the cause of cancer recurrence and all too frequently leads to death.

Metastasis is dangerous because cancer cells have the ability to float around in the bloodstream, often causing secondary tumors to get a start before the primary tumor is even discovered. This makes it vital that steps be taken to prevent metastases on an everyday basis, without waiting for a cancer diagnosis.

Cumulative preventive effects

Studies have shown fucoidan’s cancer-preventive powers extend beyond the effects involving selectins, resulting in a cumulative effect on cancer cells. For example, it is known that fucoidan can inhibit protein-melting enzymes typically used by cancer cells to force their way into tissues after traveling through the bloodstream. It can also inhibit the spread of cancer by preventing new blood vessel growth and reducing the viability of cancer cells.

Fucoidan also works to prevent cancer by slowing proliferation of cancer cells and inducing programmed cell death in cancer cells. These cumulative effects of fucoidan have been demonstrated in a number of animal studies.

For example, in a mouse study, the rodents injected with human lunch cancer cells were administered a fucoidan supplement. The supplement prevented spread of the cancer throughout the lungs, while also preventing the expected weight loss that often weakens cancer patients.

In a similar model, fucoidan supplementation prevented the spread of a highly invasive and metastatic form of liver cancer. A rat study yielded similar results. Animals were injected with human colon cancer cells, but fucoidan supplementation prevented the adhesion of malignant cells to lung capillaries by more than 50 percent.

Overall, fucoidan helps fights cancer early on by boosting the immune system. Not only is this key to the prevention of cancer, but it reduces the normal diminishing effects that aging has on the immune system.


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  • Alan Schmukler

    I would be cautious about eating anything coming from the sea around Japan. The Japanese are dumping massive amounts of radioactive material from Fukishima into the sea there.

  • Rita Shimniok

    I do not doubt the healing benefits of seaweed. However, my big question has always been – where does one obtain seaweed that is not contaminated by ocean pollutants. My daughter loves seaweed, but I hesitate to let her snack on it a whole lot as I am uncertain how much mercury, nuclear fall out and other trace toxins are being served. I would love to hear of a brand that grows their seaweed for consumers in an environmentally controlled lab to assure purity.

    • pam r

      see above comments

  • Bob

    I agree that seaweed is really good for you. Since Japan nuclear disaster seaweed soaks this radioactivity up. This was shown in Simon Fraser University biology reports. I recommend checking with a geiger counter before consuming to be sure.

  • Ariel Gail MacLean@yahoo

    But why doesn’t somebody address the life-threatening issue of widespread contamination, waaaay beyond safe levels, of radioactivity found in all ocean foods — plant and animals are severely harmed by this one ongoing event known as Fukashima. Entire species of starfish are totally disappeared…..seaweeds of all kinds are showing excessive levels of various radioisotopes…..even in-land locations are showing readings of such magnitude that we have to ask: Is It Too Late To Protect Ourselves From Fukashima Radiation Contamination and Will We Ever Be Able To Eat Ocean Foods Again? The Northern Irish Isles and Alaska Region are not immune to this, but they are definitely hiding this information — as are most so-called reporters and investigative journalists. Please somebody, get the facts before you promote seaweed consumption!

    • pam r

      I use Maine coast seaweed and there is also seaweed from Iceland. Remember seaweed helps pull heavy metals out of the body. Also, Miso soup
      and wakame actually protects you from radiation.

  • Wendy Allen

    Brown seaweed helps detox heavy metals etc. but my body did not absorb it due to Celiac and colloidal silver went deeper into my tissues and greatly hurt me. I also tried Vit C and chorella with it and rumex. I could not orally detox then since gluten/hidden gluten etc was hurting my intestines. EDTA/DMPS IV chelations helped me survive by removing heavy metals fast. Far Infrared Sauna helps remove heavy metals/chemicals/yeast/Lyme and endotoxins by sweating them out. Cancer maybe due to low oxygen due to heavy metals blocking thyroid. Gluten may lower the thyroid and lower nutrients absorbed/pH/oxygen and the immune system. Celiac may cause cancer. The liver may not detox well with Celiac, Gluten may lower nutrients/vitamins/good oils absorbed..then cells are not made right to work right.

  • pam r

    Just google seaweed Iceland for the best seaweed

  • Andrew Kane

    I will not give up using seaweed in my dishes. What I will do is look for the best brand. All foods are becoming contaminated with one thing or another. All we can do is our best in finding the most reliable source of good quality foods.