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What if the key to surviving cancer, overcoming depression, and optimizing immunity wasn’t a new drug or protocol—but something ancient, living inside you right now?
The truth is, your gut—home to trillions of microbes—may hold more influence over your health than any other system in the body. And new science is reframing everything we thought we knew about healing.
Consider this: for every 5 grams of dietary fiber you eat per day, your chance of surviving cancer increases by 30%. Not 3. Thirty.
But that’s just the beginning.
My guests today are three pioneers at the forefront of gut health research, Dr. Will Bulsiewicz, Dr. Tim Spector, and Dr. Robynne Chutkan. Together, we explore how tumors harbor their own microbial ecosystems, why 70% of your immune system lives in your gut, and how depression may not be a purely mental health issue—but an inflammatory condition rooted in microbial imbalance.
“Microbes are everywhere. They cover us from the top of our head to the tip of our toes. Everything that’s alive on this planet either is a microbiome, or has a microbiome. Those are the two choices.”
– DR. WILL BULSIEWICZ
Today, we discuss:
- The 30% Cancer Survival Fiber Discovery
- Why Tumors Have Their Own Microbiomes
- Depression as an Inflammatory Disorder
- Your Gut’s Control Over Immunity
- Ultra-Processed Food’s Microbial Damage
For those who prefer a visual experience, the conversation is available on YouTube. As always, the audio version streams wild and free on Apple Podcasts and Spotify.
Peace + Plants,

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- Connect with Dr. Will Bulsiewicz: Website | Instagram | Facebook
- Dr. B’s Book: Fiber Fueled
- Connect With Tim: Website | Facebook | Twitter | Instagram
- Tim’s Book: Food for Life
- Tim’s Book: Spoon Fed
- Tim’s Book: The Diet Myth
- Connect with Dr. Chutkan: Website | Instagram | Twitter | Facebook
- Dr. Chutkan’s Book: The Anti-Viral Gut: Tackling Pathogens from the Inside Out
- Dr. Chutkan’s Book: The Microbiome Solution: A Radical New Way to Heal Your Body from the Inside Out
- Dr. Chutkan’s Book: Gutbliss: A 10-Day Plan to Ban Bloat, Flush Toxins, and Dump Your Digestive Baggage
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Thank The Team: I do not do this alone. Send your love to Jason Camiolo for audio engineering, production, show notes and interstitial music; with additional audio engineering by Cale Curtis and additional music by Moby; Dan Drake & Morgan McCrae for video, & editing; graphics by graphics by Alejandro Ribadeneira & Bryan Lawrence; portraits by Davy Greenberg; copywriting by Ben Pryor; and theme music by Tyler Piatt, Trapper Piatt & Hari Mathis.
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