Gallic acid metabolites are markers of black tea intake in humans

JM Hodgson, LW Morton, IB Puddey…

Index: Hodgson, Jonathan M.; Morton, Lincoln W.; Puddey, Ian B.; Beilin, Lawrence J.; Croft, Kevin D. Journal of Agricultural and Food Chemistry, 2000 , vol. 48, # 6 p. 2276 - 2280

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Citation Number: 81

Abstract

Gallic acid is one of the main phenolic components of black tea. The objective of this study was to identify urinary gallic acid metabolites with potential for use as markers of black tea intake. In an initial study, nine compounds, assessed by using gas chromatography-mass spectrometry, were found to increase in concentration in urine after 3 cups of black tea over 3 h. A subsequent study employed a controlled crossover design in which 10 subjects ...