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Caffeinated is a wide-angle investigation of the science, culture, business and regulation of America's favorite pick-me-up. The book explores this addictive, largely unregulated drug found in coffee, energy drinks, teas, colas, chocolate, and even pain relievers. Caffeinated explains why caffeine has such a powerful effect on everything from boosting our mood to improving our athletic performance, as well as how—and why—brands such as Coca-Cola have ducked regulatory efforts for decades. And the book shows how caffeine is quietly used to reinforce our buying patterns, and how it can play a role in promoting surprising health problems like obesity and anxiety.