Summary
The average caffeine content of an 8-oz, brewed cup of coffee is 95 mg
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, while a single espresso or espresso-based drink contains 63 mg
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, and decaf coffee contains about 3 mg of caffeine (on average).
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Caffeine content can vary based on the type, serving size, and bean variety.
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Up to 400 milligrams of caffeine a day is considered safe for most adults
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, but people's sensitivity to caffeine varies.
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According to
