How long does 80 mg of caffeine last in your system?
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3 min read
While caffeine's effects can be felt in as little as 15 minutes, its half-life typically ranges from 4 to 6 hours for most healthy adults, meaning 80 mg of caffeine will gradually decrease over several hours. A person's unique metabolism, genetics, and lifestyle habits determine exactly how long the stimulant effects are noticeable.