Gut health is everywhere right now. The hashtag #GutTok has over 6 billion views on TikTok, the global digestive health product market is worth over $60 billion, and viral trends that promise to “hack your gut” through miracle products, cleanses, and restrictive diets are all the rage. But what does gut health really mean, and what can science tell us about how to make sure our gut is in good shape?

The gut microbiome, a complex network of trillions of microorganisms living inside our digestive system, may hold the key to the mysteries of gut health. We have a symbiotic relationship with all of those little guys; we keep them well-fed and they produce substances that can benefit our body and brain. These microbes help regulate bodily functions, protect against disease, and recover from illnesses like cyclosporiasis, which is spreading right now across the US.

But with so many voices chiming in on gut health, pushing everything from probiotic foods and supplements to wellness shots and coffee enemas, it can be hard to tell what information is based on real research and what might just be a marketing gimmick or social media clickbait. Vox spoke to doctors and visited Cedars-Sinai in Los Angeles to bust some gut health myths for science-backed advice. 

Read more about gut health and gut microbiome research:

• Vox editor Katherine Courage’s book, Cultured: How Ancient Foods Can Feed Our Microbiome.
• Cedars-Sinai’s Human Microbiome Research Institute.
• The MAST program at Cedars-Sinai.
• Trisha Pasricha’s book, You’ve Been Pooping All Wrong. 
• Vox’s explainer video on probiotics in yogurt.
• Pew Research Center’s findings on why people look to influencers for health and wellness information.
• The Myths and Scientific Realities About Gut Microbiota.

This video is presented by Colgate. Colgate doesn’t have a say in our editorial decisions, but they make videos like this one possible.

F1 races are exhilarating. While racing alongside 21 other cars, an F1 driver can reach speeds of up to 231 mph, making it one of the world’s most dangerous sports.

And F1 drivers need to be physically prepared to prevent disaster. Over the course of a single race, they experience hundreds of pounds of force, temperatures up to 130°F, and risk extreme dehydration that can lead to lowered brain function. In order to stay on the road and not pass out, F1 drivers have to be in peak physical condition. 

In order to find out how F1 drivers can survive a sport that is so physically demanding, I hit the gym. Since F1 is such an international sport, there aren’t many specialized trainers in the US. So with the help of an F1 performance expert currently based in the United Arab Emirates, I worked out with David Dunlop, a strength and conditioning coach who works with NFL players. And it turns out that training for F1 is surprisingly similar to training to be a linebacker. 

Read more about the fitness required to drive in an F1 race: 

• Mercedes has an excellent breakdown of G-force on a turn.

• This article from The Drive breaks down the physics of an F1 race.

• Motorsport Industry Association on how F1 simulators help drivers train for the mental side of races.

• New York Times article about the history of F1 in the US (and why people in the states are talking about it now).

This video is presented by the Ford Motor Company. Ford doesn’t have a say in our editorial decisions, but they make videos like this one possible.