One of the most popular (& over rated) herbal supplements has been found to cause cancer in laboratory animals. The National Toxicology Program announces after 2 years of study, clear evidence shows that recommended doses of Ginkgo Biloba causes liver cancer in mice and thyroid cancer in rats. Some of the cancers were quite aggressive, and some of the animals developed more cancers ever seen in an NTP lab before. Furthermore, there has yet to be any evidence to show that the use of Ginkgo improves memory and concentration, or delays cognitive decline.
The Food & Drug Administration has been telling food manufacturers to stop adding Gingko to foods and drinks for years. Since Congress passed the law of 1994 stating that the public has the right to make their own choices, it is harder for an agency to ban unsafe ingredients. Until it is removed from the shelves, the smart choice for the public is to ban the items themselves.
~ National Toxicology Program.gov, 2013