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12 Surprising Sources of Caffeine
The caffeine crutch
by Sarah Klein
Overworked and sleep-deprived, more people are using caffeine as an energy crutch than ever before, experts say. That’s not all bad: In fact, 250 milligrams of caffeine per day—that’s two to three cups of joe—wakes up the brain, improves concentration, relieves stress, and may also help you live longer. But if intake is turning into addiction, you may notice side effects , including dehydration, trouble sleeping, anxiety, an upset stomach, and even problems during prenancy.
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