Learn · TED

Talk5 min

How does caffeine keep us awake?

Hanan Qasim · TED

Watch At TED

About

Over 100,000 metric tons of caffeine are consumed around the world every year. That’s equivalent to the weight of 14 Eiffel Towers! Caffeine helps us feel alert, focused, and energetic, even if we haven’t had enough sleep — but it can also raise our blood pressure and make us feel anxious. So how does it keep us awake? Hanan Qasim shares the science behind the world’s most widely used drug. [Directed by Draško Ivezić, narrated by Addison Anderson, music by Jure Buljević].

The talk

  1. How does caffeine keep us awake? 5 min · TED's player

Credits and licence

Institution
TED
Department
TED-Ed
Speaker
Hanan Qasim
Year
2017
Level
For everyone
Language
English
Subjects
Medicine and health, Psychology and the brain, Teaching and learning
Source
TED
Licence
CC BY-NC-ND 4.0, as TED states it. Non-commercial use only, and no changed versions. TED's terms
Attribution
TED Talks are licensed by TED under Creative Commons BY-NC-ND 4.0 International and are shown here in TED's own player, as TED's usage policy asks.
Who can watch
TED gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed