
Episode 3 Preview | Fuel
Preview: Episode 3 | 30sVideo has Closed Captions
Journey through the factory at the center of our bodies that turns food into energy.
Through the worlds of a religious faster, an ultra-marathon runner, a farmer and a young girl beating allergies, go deep into the world of the human gut, which processes the fuel our bodies need to keep going.
Problems playing video? | Closed Captioning Feedback
Problems playing video? | Closed Captioning Feedback

Episode 3 Preview | Fuel
Preview: Episode 3 | 30sVideo has Closed Captions
Through the worlds of a religious faster, an ultra-marathon runner, a farmer and a young girl beating allergies, go deep into the world of the human gut, which processes the fuel our bodies need to keep going.
Problems playing video? | Closed Captioning Feedback
Where to Watch Human: The World Within
Human: The World Within is available to stream on pbs.org and the PBS app.
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Learn Moreabout PBS online sponsorshipVideo has Closed Captions
Clip: Ep3 | 2m 6s | An introduction to the amazing functions of the human body's digestive system. (2m 6s)
The Gut Microbiome is the Hub of Our Immune System
Video has Closed Captions
Clip: Ep3 | 2m 23s | The Gut microbiome contains bacteria that keep us healthy when well fed and tended to. (2m 23s)
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