title: Tea consumption and cardiovascular disease risk.
abstract: BACKGROUND
  The present analysis was conducted in response to inconsistent epidemiologic studies on the relation between consumption of tea and cardiovascular diseases.
  
  
  OBJECTIVE
  We undertook a literature review of the consistency and strength of the associations between tea and cardiovascular diseases on the basis of published observational studies and meta-analyses addressing tea or tea flavonoids and cardiovascular disease risk.
  
  
  METHODS
  We performed a search in 3 databases for meta-analyses and compared them with studies they subsumed. We performed an additional search for subsequent studies to determine whether the conclusions were consistent.
  
  
  RESULTS
  Many epidemiologic studies have been conducted and summarized in 5 meta-analyses on either tea consumption or flavonoid consumption and cardiovascular disease or the subset of stroke. Heterogeneity of effect was seen when the outcome included all cardiovascular diseases. In the case of stroke, a consistent, dose-response association with tea consumption on both incidence and mortality was noted with RRs of 0.80 (95% CI: 0.65, 0.98) for flavonoids and 0.79 (95% CI: 0.73, 0.85) for tea when high and low intakes were compared or the addition of 3 cups/d was estimated.
  
  
  CONCLUSIONS
  Thus, the strength of this evidence supports the hypothesis that tea consumption might lower the risk of stroke.
authors.affiliation: David Geffen School of Medicine, University of California, Los Angeles, CA.
authors.forename: Lenore
authors.initials: L
authors.lastname: Arab
authors.forename: Faraz
authors.initials: F
authors.lastname: Khan
authors.forename: Helen
authors.initials: H
authors.lastname: Lam
mesh_terms: D028241:Camellia sinensis / Q000737:chemistry*; D002318:Cardiovascular Diseases / Q000517:prevention & control; D005419:Flavonoids / Q000494:pharmacology / Q000627:therapeutic use*; D006801:Humans; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D020521:Stroke / Q000517:prevention & control*; D013662:Tea / Q000737:chemistry*
chemical_list: D005419:Flavonoids; D010936:Plant Extracts; D013662:Tea