A dietary supplement, which is believed to enhance one’s memory, has been linked to growth of cancer tumors after a two-year-long study carried out on mice and rats. The research team at NTP (National Toxicology Program) observed a higher tendency for tumor growth, especially liver and thyroid tumors, among the rodents that were administered the popular Ginkgo Biloba.
The same conclusion was reached after a shorter study, held over the span of three months. These mice and rats were found to develop certain characteristics that precede the growth of tumors. A scientist with the team, Dr. Cynthia Rider, reported that the tumors that grew were quite impressive and occurred at one of the highest rates they had ever observed.
The data collected showed the mice that were administered 600mg/kg of the supplement, developed the tumors. Among the rats, thyroid tumors were more predominant than liver tumors. Currently, more research would have to be carried out for the data to be interpreted in a way to fully advise consumers what amounts of the extract can be considered safe. Dr. Rider further explained that the extract is very complex in structure and that the department was not able to track all of the changes of its various components within the mice. However, she said, since a relationship had been established between the supplement and cancer, more investigations into the extract should be carried out to see if it is more harmful to the body than beneficial.
The results were disputed by the American Botanical Council, which stated that the samples tested by the researchers were not the ones commonly used in the United States. Rider refuted the claims, saying that the extracts were obtained from a supplier who sells their products to companies in the States.
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