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Laboratory, epidemiological, and human intervention studies show that tea (Camellia sinensis) may be useful in the prevention of obesity.

Abstract
Tea (Camellia sinensis, Theaceae) and tea polyphenols have been studied for the prevention of chronic diseases, including obesity. Obesity currently affects >20% of adults in the United States and is a risk factor for chronic diseases such as type II diabetes, cardiovascular disease, and cancer. Given this increasing public health concern, the use of dietary agents for the prevention of obesity would be of tremendous benefit. Whereas many laboratory studies have demonstrated the potential efficacy of green or black tea for the prevention of obesity, the underlying mechanisms remain unclear. The results of human intervention studies are mixed and the role of caffeine has not been clearly established. Finally, there is emerging evidence that high doses of tea polyphenols may have adverse side effects. Given that the results of scientific studies on dietary components, including tea polyphenols, are often translated into dietary supplements, understanding the potential toxicities of the tea polyphenols is critical to understanding their potential usefulness in preventing obesity. In this review, we will critically evaluate the evidence for the prevention of obesity by tea, discuss the relevance of proposed mechanisms in light of tea polyphenol bioavailability, and review the reports concerning the toxic effects of high doses of tea polyphenols and the implication that this has for the potential use of tea for the prevention of obesity. We hope that this review will expose areas for further study and encourage research on this important public health issue.
AuthorsKimberly A Grove, Joshua D Lambert
JournalThe Journal of nutrition (J Nutr) Vol. 140 Issue 3 Pg. 446-53 (Mar 2010) ISSN: 1541-6100 [Electronic] United States
PMID20089791 (Publication Type: Journal Article, Research Support, N.I.H., Extramural, Review)
Chemical References
  • Flavonoids
  • Phenols
  • Polyphenols
  • Tea
Topics
  • Adult
  • Camellia sinensis
  • Flavonoids (chemistry, pharmacology)
  • Humans
  • Molecular Structure
  • Obesity (prevention & control)
  • Phenols (chemistry, pharmacology)
  • Polyphenols
  • Tea (chemistry)

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