A series of animal studies undertaken at the prestigious McGovern Medical School, University of Texas Health Science Center in Houston (UTHealth) show that Maritech® Fucoidan extracts reduced tumor growth in select cancers and significantly improved the effectiveness of the common chemotherapy drug tamoxifen.

The breakthrough research demonstrates the potential for Fucoidan to be safely used as a complementary cancer therapy

alongside traditional chemotherapy. Whether you choose traditional cancer treatments, or alternative, the benefits of Fucoidan are obvious.

The extracts, developed and manufactured by Marinova, were tested in six human tumor mouse models, including cervical, breast and ovarian cancers. Fucoidan extracts were orally administered to mice for 30 days and compared to controls.

Fucoidan Caused Decrease in Cancer Growth up to 70%

Ingestion of the Fucoidan extracts decreased the growth of a human ovarian cancer tumor line by up to 33% and a human cervical cancer tumor line by up to 70%.

The same breast and ovarian cancer models were also used to assess Fucoidan activity in combination with Paclitaxel or Tamoxifen, two commonly used chemotherapy agents. The results showed Fucoidan considerably improved the efficacy of Tamoxifen towards breast cancer. Fucoidan decreased breast cancer tumor growth in this animal model by up to an additional 26% when taken alongside Tamoxifen.

These findings build on results from a series of in vitro studies performed under the same research program. The in vitro studies showed that the two Fucoidan extracts did not interfere with key metabolic pathways necessary for chemotherapy function and directly inhibited a number of human cancer cell lines. Strong synergistic activity between Fucoidan and both Paclitaxel and Tamoxifen was also observed, as well as activity with Topotecan.

Associate Professor Dr. Judith A. Smith, Director of the Women’s Health Integrative Medicine Research Program at UT Health, led the research project and commented on the results.


“This was the first research program to comprehensively assess the metabolism of Fucoidan compounds for possible chemotherapy drug interactions.

“A pharmacokinetic study is now underway at UT Health to further assess safety and observe quality of life parameters in human cancer patients.”

Adding to these findings, a further study in the research program found that both Fucoidan extracts enhanced the immune function of cancer-affected mice. Immune markers immunoglobulin G (IgG) and interleukin 6 (IL-6) were both significantly modulated in Fucoidan-fed mice, with a 500% increase in IgG levels relative to controls after 1 week.

IgG is the main type of antibody found in humans. It helps control infections by binding to pathogens (such as bacteria and viruses) and alerting circulating immune cells. IgG levels are often suppressed in oncology patients, making them vulnerable to a wide range of infections. Thus, supplementing with Fucoidan appears to be helpful.

Dr Helen Fitton, Chief Scientist at Marinova, highlighted the importance of these findings:

“These results confirm the potential for Fucoidan to help restore functional immunity in cancer patients. To have identified a safe, natural compound that has such a significant effect on immunity in an oncology setting is really quite remarkable.”

The two clinical studies have been published in the journal, Integrative Cancer Therapies:

  • “Evaluation of Fucoidan in combination with Paclitaxel or Tamoxifen in breast and ovarian orthotopic mouse models”
  • “Pre-clinical evaluation of safety of Fucoidan from Undaria Pinnatifida and Fucus Vesiculosus for use by oncology patients”

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