Tea Advisory Panel - A randomised cross-over trial to evaluate the impact of tea on measures of hydration

Research and reviews

A randomised cross-over trial to evaluate the impact of tea on measures of hydration

Posted date:: 17th Jun '10
Categories:: TAP Reports
Attached document:: Download PDF (433.1 KB)

While studies on caffeine pills have produced inconsistent results1, those on caffeinated drinks, at caffeine intakes of 114-420mg/d, have found no significant impact on hydration. However, there have been no randomised controlled trials on tea, as consumed.

The present trial aimed to assess the impact of 4 x 240ml mugs of black, i.e. regular tea, on blood and urine measures of hydration. The control condition was a similar volume of boiled water. Four mugs is slightly above average daily tea intakes in the UK.

Please download the document above to read the full report.

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“Tea is a natural source of fluoride.”

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