Dr. Universe: Why does caffeine make us stay up longer?

Illustration of Dr. Universe looking through a microscope.
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You’re right, caffeine can help us stay awake — but only for so long. John White, a pharmacy professor at Washington State University knows a lot about how caffeine works in the body. It may give us a temporary feeling of being awake, but it also might make us feel more nervous, have difficulties breathing, or a faster heart rate.

To read the full answer, see the new Dr. Universe website.

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