Fix Your Gut Naturally: Dr. Will Bulsiewicz on Fiber Maxing and Building Healthier Microbiome

The Exam Room by the Physicians Committee

Physicians Committee

Carroll, Health & Fitness, Diabetes, Science, Nutrition, Vegan, Pcrm, Barnard, Weightloss, Food, Health, Recipes, Medicine, Diet

4.9 • 3.3K Ratings

🗓️ 13 November 2025

⏱️ 43 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

Your gut holds the key to better health — and Dr. Will Bulsiewicz is back to help you unlock it!

In this Exam Room Podcast mailbag episode, Chuck Carroll and Dr. B answer your biggest questions about gut health, fiber, inflammation, and the microbiome.

Learn why diversity is strength — both in your diet and your gut — and how simple shifts like cooling your potatoes or walking after meals can feed your microbes for life-changing benefits.

Topics include:
- Fiber Maxing: the TikTok trend explained
- Why resistant starch boosts your microbiome
- Artificial sweeteners vs. sugar — what's worse?
- How exercise supports gut health
- The gut-brain connection and stress
- Sneak peek into Plant Powered Plus (available Jan. 13)

📘 Pre-order Dr. B's new book: https://amzn.to/42vFhKz
🔗 Dr. B's Gut Health Collective and courses: https://theguthealthmd.com

If you feel like you've raised your health IQ, please leave a 5-star rating and nice review on Apple Podcasts or Spotify.

About Us

The Physicians Committee is dedicated to saving lives through plant-based diets and ethical and effective scientific research. We combine the clout and expertise of more than 17,000 physicians with the dedicated actions of more than 175,000 members across the United States and around the world.

Transcript

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0:00.0	Today on the exam room.
0:04.0	This idea of fiber maxing though among the kids is basically like crank up the fiber as hard as you can.
0:11.0	There's another thing which is like beans are having a moment Chuck where basically the kids are saying two cups of beans a day.
0:18.0	I love it and I'm excited that beans are having a moment and I'm excited that fiber is having a moment but to have two cups a beans a day. I love it. And I'm excited that beans are having a moment. And I'm
0:21.8	excited that fiber is having a moment. But to have two cups a day, you have to build to that.
0:26.4	Like fiber maxing, do I support that? Yes, but I need to show you how to get there.
0:35.4	Welcome to the exam room podcast, brought to you by the Physicians Committee.
0:39.3	Hi, I'm Chuck Carroll, raising health IQs coast to coast and around the world.
0:44.4	Hi to the exam room.
0:45.4	He's listening in Knoxville, Tennessee, Des Moines, Iowa, and Madrid, Spain.
0:51.4	Wherever you are, we appreciate you helping to make the world a healthier place.
0:55.6	This is episode 90 of season 8, number 689 overall. And today, my friend, is a wide-ranging
1:03.8	gut health Q&A, a doctor's mailbag devoted to the GI tract, my friends. The gut brain connection is in full effect. All things gut
1:13.4	are on the table, including this new trend. Have you seen this on TikTok? Something called
1:18.4	fiber maxing? Yeah, I hadn't heard of this yet either. But our guest did. We're also going to be
1:23.6	learning why leftover potatoes can actually be better for you than fresh ones.
1:29.1	Plus, how exercise can help shape your microbiome and the surprising connection between your
1:34.8	gut and your brain, which may not be all that surprising given the fact that we talk about it
1:40.1	here on the show quite a lot. But nonetheless, it is very important. And today, my friends,
1:45.9	we are going to be talking to the author of the brand new forthcoming book, Plant Powered Plus,
1:51.3	who shares a deeply personal story that became the greatest chapter he says he's ever written.
1:58.7	Today, my friend, we are joined by my good friend, the Prince of Porcelain,
	...

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