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Caffeine is the most popular psychoactive substance in the world. Every day, billions of people start their morning with coffee, tea, or energy drinks to feel energized and increase concentration. But ...

Coffee, cola or an energy drink: caffeine is the world's most widely consumed psychoactive substance. Researchers from the University of Basel have now shown in a study that regular caffeine intake ...

Coffee contains plenty of caffeine—enough, in principle, to make every cup taste hideously bitter. Fortunately for ...