green tea helps preserve kidney function

From: Doug Skrecky (oberon@vcn.bc.ca)
Date: Sat Oct 30 1999 - 12:03:49 MDT


Authors
  Yokozawa T. Dong E. Oura H.
Institution
  Research Institute for Wakan-Yaku, Toyama Medical and Pharmaceutical
  University, Japan.
Title
  Proof that green
  tea tannin suppresses the increase in the
  blood methylguanidine level associated with renal failure.
Source
  Experimental & Toxicologic Pathology. 49(1-2):117-22, 1997 Feb.
Abstract
  The effects of a green tea
  tannin mixture and its individual tannin
  components on methylguanidine were examined in rats with renal failure. The
  green tea tannin mixture
  caused a dose-dependent decrease in methylguanidine, a substance which
  accumulates in the blood with the progression of renal failure. Among
  individual tannin components, the effect was most
  conspicuous with (-)-epigallocatechin 3-O-gallate and (-)-epicatechin
  3-O-gallate, while other components not linked to gallic acid showed only
  weak effects. Thus, the effect on methylguanidine was found to vary among
  different types of tannin.



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