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Natural sources of caffeine are instances where caffeine, a chemical stimulant, occurs in nature — typically in the leaves or berries of different plants. Coffee beans and tea leaves are two of the most well known natural sources, but they are by no means the only ones. A number of different herbs, leaves and roots from around the world contain caffeine compounds, making the substance very common. Every continent except Antarctica is home to at least some indigenous sources of the stimulant, though how it is used and processed can vary tremendously from place to place.
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