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Caffeinated beverages refer to non-alcoholic drinks that contain caffeine, a natural stimulant found in various plants such as coffee and tea leaves. These beverages are known to enhance alertness, improve concentration, and boost energy levels. Common examples include coffee, tea, energy drinks, soda, and certain types of bottled water. Caffeinated beverages can vary greatly in their caffeine content, with some containing only trace amounts while others have high concentrations that can range from 50-200 milligrams per serving. Despite its widespread use, excessive consumption of caffeine can lead to negative side effects such as insomnia, nervousness, restlessness, and rapid heart rate.