Caffeine is a naturally occurring stimulant found in coffee beans, tea leaves, cocoa beans, and other plants. It's a central nervous system stimulant of the methylxanthine class and is the world's most widely consumed psychoactive drug. It's consumed globally in beverages like coffee, tea, and soda. Caffeine is also added to energy drinks, supplements, and even some foods. It is used for its wakefulness-promoting, physical performance-enhancing, and cognitive-enhancing properties.
Caffeine is available in various forms from numerous manufacturers and retailers. Common sources include coffee, tea, and energy drinks, but it is also sold in pure powdered and pill forms. The FDA considers caffeine both a drug and a food additive. Caffeine Informational sources include entities like the Center for Science in the Public Interest which provides data on caffeine content in various foods and beverages. The cost of caffeine varies depending on the source; a cup of coffee at a café might cost around $2, while caffeine pills can be purchased for as little as $6 per bottle. However, pure powdered caffeine can be dangerous, with just one teaspoon containing the equivalent of 28 cups of coffee. Availability is widespread, from local grocery stores to online retailers, but consumers should be aware of the risks associated with highly concentrated forms.
