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Correct! Caffeine is a plant alkaloid found in various plant varieties, primarily in coffee, tea, and cocoa as well as soft drinks using the Kola nut. Caffeine acts as a central nervous system stimulant and in the process increases levels of adrenaline, which leads to increased blood flow, heart rate, and blood pressure. It is completely absorbed in the stomach and small intestine within 45 minutes of ingestion. Excessive caffeine use over time can lead to peptic ulcers, insomnia, and heart palpitations.
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