Caffeine is the most commonly used drug on the planet. In fact, the world consumes the equivalent of one caffeine drink, per person, per day. It's such a part of everyday life, we don't even consider it a poison. Yet research shows that some of the effects of caffeine are similar to those experienced with hard drugs. But there is another side to the story - caffeine is being put to good use treating premature babies and the elderly
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Title from resource description page (viewed July 10, 2014)