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Caffeine is the most widely used psychoactive drug in the world, consumed by billions of people every day in the form of tea, coffee, and energy drinks. It is commonly consumed to boost alertness and ...

Few substances have woven themselves so seamlessly into the fabric of daily life as caffeine. Found in coffee, tea, chocolate and countless performance-enhancing supplements, this naturally occurring ...

Caffeine is a stimulant found naturally in beverages like coffee and tea. It’s also added to others, such as energy drinks and soda. Caffeine increases chemicals in your brain that improve mood, ...