How much caffeine is too much? The FDA says there is no danger associated with 400 milligrams of caffeine. That's equal to 4-5 cups of joe.
Keep in mind, some people are sensitive to caffeine which means their bodies may take longer to process.
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Women who are pregnant or are thinking of becoming pregnant should speak to their doctor about how much caffeine is okay.
SEE ALSO: Are lovers of black coffee psychopaths?
The American Academy of Pediatrics discourages kids and teens from consuming caffeinated beverages.
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Of course, caffeine is not a good substitute for a good night's sleep.