MYTH: Drinking tea causes dehydration
THE TRUTH: It’s a popular belief that tea is dehydrating because it has caffeine, but the level of caffeine you get from drinking moderate amounts of tea, even strong tea, doesn’t dehydrate you. Tea is actually 99.5 percent water and counts towards your fluid intake for the day, so it can help keep you hydrated. Hydration is important for concentration, alertness and physical performance. Canada’s Food Guide encourages you to satisfy your thirst with water as a calorie-free way to help stay hydrated. Hot or cold, tea is also hydrating and, with no added sugar, is calorie-free and tastes great.
Source: Dietitians of Canada