While the effects of caffeine might only last five to six hours, it can take a full 10 hours for all the caffeine of one cup of coffee (eight ounces) to completely leave your system.īut how long caffeine lasts also depends on your personal caffeine tolerance and genetics. So how long does caffeine last in your system? If that sounds like you, keep in mind that 400 mg of caffeine (about four cups of coffee) is the general recommended daily limit. Meaning if you’ve built up a tolerance, you’ll need to consume more caffeine to feel its effects. And the caffeine’s effects will peak after about an hour.īut those who have a high tolerance for caffeine (cough, us, cough) might not feel the energy boost quite as soon - or as intensely. (Which happens to be almost the perfect amount of time for a coffee nap). Some people can feel perked up by caffeine as soon as 15 minutes after consuming it.
We broke down exactly how long caffeine stays in your system - so you can plan your day (and naps) accordingly.
And when your cut-off time should be, depending when you want to fall asleep. The real art is knowing how long the caffeine-high will actually last. Coffee, energy drinks, tea…there are many ways to get your caffeine fix.
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