There is some concern expressed in professional health literature and the wider media that caffeinated beverages may not support normal hydration. To examine this, a systematic review was carried out to identify intervention trials that tested the impact of tea consumption on validated markers of hydration. The six trials, which mostly involved males, confirmed that tea performed in a similar way to plain water up to intakes of six servings daily. Guidelines for safe consumption of caffeine indicate that a caffeine intake of up to 400mg daily (200mg for a single serving) is safe for adults. Average tea consumption in the UK, at two to three servings daily, fits within this.
You can read the paper at
Journalists can request more information from firstname.lastname@example.org.
This site has been set up by the Tea Advisory Panel to provide journalists and health professionals with the latest scientific research and nutritional information on tea. Please tick one of the boxes below to indicate whether you are a journalist or health professional.