Tea (Camellia sinensis) is the most widely consumed beverage in the world after water.
Media concerns about caffeine and fluoride have led to questions about the suitability of tea as a source of fluid and its role in hydration. However, studies on caffeine commensurate with the amounts found in tea as well as studies on tea itself, suggesting that tea contributes to normal hydration in contrast to lay beliefs that caffeine is dehydrating. Tea contains approximately 99% water. It is an important source of fluid and can count towards the daily intake of 8 cups of fluid. Both the Food Standards Agency and the British Dietetic Association advise that tea can help to meeting daily fluid requirements. Moreover, the idea that tea contains as much caffeine as coffee is erroneous. A cup of tea contains about a third of the caffeine in an average cup of filtered coffee and proportionately much less compared to an espresso.
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