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agate
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Joined: 17 May 2006
Posts: 5694
Location: Oregon
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 Posted: Thu Apr 18, 2013 10:46 am Post subject: A thumbs down on ginkgo biloba |
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From the Center for Science in the Public Interest, April 18, 2013:
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Today the Center for Science in the Public Interest issued an alert urging consumers not to purchase or consume herbal supplements, teas, or energy drinks that contain Ginkgo biloba. Based on an important new study from the federal government’s National Toxicology Program, CSPI is downgrading its rating of ginkgo from “safe” to “avoid.”
In an important study published yesterday, government toxicologists found that Ginkgo biloba extract provided “clear evidence” that the ingredient caused liver cancer in mice and “some evidence” that ginkgo caused thyroid cancer in rats.
Pills or other products containing ginkgo are often marketed as having some benefit for memory or concentration, but the evidence for those claims has long been dubious. We know today that those pretend benefits are outweighed by the real risk of harm.
“We conclude that Ginkgo biloba extract caused cancers of the thyroid gland in male and female rats and male mice and cancers of the liver in male and female mice,” is how the government researchers described their findings.
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This is the section on ginkgo from the CSPI's "Chemical Cuisine" page:
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Companies add small amounts of Ginkgo biloba to beverages because it supposedly boosts memory and thinking, but most studies in healthy people show little or no benefit at levels greater than what's added to foods and beverages. Since ginkgo appears to interfere with blood clotting, ginkgo should not be consumed before or after surgery, during labor and delivery, or by those with bleeding problems such as hemophilia. Importantly, in 2013, the U.S. Government's National Toxicology Program published the first study that could evaluate Ginkgo's ability to cause cancer. The study found "clear evidence" that Ginkgo biloba caused liver cancer in male and female mice and "some evidence" that Ginkgo caused thyroid cancer in rats.
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http://cspinet.org/ |
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