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How long does it take for caffeine to leave your system?


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Caffeine reaches a peak level in your blood within 30 to 60 minutes. It has a half-life of 3 to 5 hours. The half-life is the time it takes for your body to eliminate half of the drug. The remaining caffeine can stay in your body for a long time.

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Caffeine remains around four hours within the human body.

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