High Doses Of Phytochemicals In Teas And Supplements Could Be Unhealthy
In their article, scheduled for the current issue of ACS's Chemical Research in Toxicology, a monthly journal, Chung S. Yang and colleagues analyze available data on the toxic potential of polyphenols. That group of dietary phytochemicals includes flavonoids, whose suggested beneficial effects in fruits and vegetables include prevention of heart disease and cancer. The data was from studies done in humans and laboratory animals.
The report cites specific examples of toxic effects, including reports of liver, kidney, and intestinal toxicity related to consumption of high doses of green tea-based dietary supplements. The risk of such toxicity may be greater in individuals taking certain medications, or with genetic traits, that increase the bioavailability of phytochemicals, the researchers said. Citing the need for new studies on the topic, the report concludes: "Only when such data are compared to the evidence for beneficial health effects can a balanced judgment be made regarding the potential utility of these compounds for disease prevention and treatment."
ARTICLE #3 "Possible Controversy over Dietary Polyphenols: Benefits vs. Risks"
CONTACT:
Chung S. Yang, Ph.D.
Rutgers, The State University of New Jersey
Piscataway, NJ 08854
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Article adapted by Start Sanatate from original press release.
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ACS News Service Weekly PressPac -- April 25, 2007
The American Chemical Society - the world's largest scientific society - is a nonprofit organization chartered by the U.S. Congress and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.
Contact: Michael Woods
American Chemical Society
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