# How does caffeine keep us awake?

- 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](https://www.ted.com/talks/hanan_qasim_how_does_caffeine_keep_us_awake)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

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. \[Directed by Draško Ivezić, narrated by Addison Anderson, music by Jure Buljević\].

## Lectures

1. [How does caffeine keep us awake?](https://invisiblenetwork.ai/learn/ted/hanan_qasim_how_does_caffeine_keep_us_awake/772046adc8eb), 5 min (TED's player)