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Water: How much should you drink every day?

Beyond the tap: Other sources of water

You don't need to rely only on what you drink to meet your fluid needs. What you eat also provides a significant portion. For example, many fruits and vegetables, such as watermelon and spinach, are almost 100 percent water by weight.

In addition, beverages such as milk, juice and herbal teas are composed mostly of water. Even caffeinated drinks — such as coffee and soda — can contribute to your daily water intake. But water is your best bet because it's calorie-free, inexpensive and readily available.

Sports drinks should be used only when you're exercising intensely for more than an hour. These drinks help replace electrolytes lost through perspiration and sugar needed for energy during longer bouts of exercise.

Energy drinks are different from sports drinks. Energy drinks generally aren't formulated to replace electrolytes. Energy drinks also usually contain large amounts of caffeine or other stimulants, sugar, and other additives.

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