High Protein Low Fiber — The Most Damaging Gut Combination | ft. Dr. Karan Rajan HTS #485

Heal Thy Self with Dr. G

Wellness Loud

Alternative Health, Health & Fitness

4.9 • 1.6K Ratings

🗓️ 18 May 2026

⏱️ 59 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

Sponsored By: → Santa Barbara Chocolate | CocoaDynamics available at https://SantaBarbaraChocolate.com. Use code DRG20 for 20% off. → Timeline | Timeline’s clinically proven formula is now available at a new, lower price. Mitopure now starts at $79, when you go to https://timeline.com/DRG → AquaTru | Go to https://AquaTru.com now for 20% off (your purifier) using promo code DRG. AquaTru even comes with a 30-day best-tasting water guarantee. Episode Description You can eat 30 grams of fiber a day and still be making the wrong choice for your microbiome. Because it was never just about how much you eat. It's about where that fiber is actually fermenting in your colon. Dr. Karan Rajan is a surgeon, gut health expert, and one of the most followed doctors on the internet. He spent years operating on colon cancers and bowel disease before realizing the most powerful thing he could do was hand people the information they were never given. In this conversation he breaks down the gut in a way that will make you want to reorganize your entire kitchen by the time it's over. In this episode, you'll discover: • Why the old soluble vs insoluble fiber model is outdated and what fermentation geography actually means — and how eating only one type of fiber can cause gas and bloating even when you're hitting your daily target • Why the protein obsession sweeping wellness culture may be quietly turning your gut bacteria into gremlins, and what happens when your microbes run out of fiber to eat • How your microbiome can begin to change within 48 hours of increasing fiber intake, and the exact ramp up strategy Dr. Karan uses to avoid the gas and bloating that makes most people quit If you have a gut, this episode is for you. Find Dr. Karan: Instagram: https://www.instagram.com/drkaranrajan TikTok: https://www.tiktok.com/@dr.karanr YouTube: https://www.youtube.com/c/DrKaran Book: This Is Vital Information — https://www.amazon.com/This-Vital-Information-Everything-Embarrassed-ebook/dp/B0FHC36WLD Timestamps: 0:00 - Intro 1:58 - Meet Dr. Karan Rajan: Gut Surgeon Turned One of the Most Followed Doctors Online 3:02 - Rapid Fire: Ground vs. Whole Chia Seeds, the Gut-Skin Axis & How Often You Should Poop 9:03 - Why He Left Surgery to Educate Millions for Free 12:42 - The Microbiome: Medicine's "Dark Matter" (And Who's Really in Control) 15:22 - Could Your Microbiome Be Influencing Who You're Attracted To? 17:47 - The Gut-Brain Axis: Is Mental Health Treatment Missing a Huge Piece? 24:43 - What's Actually Exciting Right Now in Microbiome Science 29:47 - The Breakfast Swap That Changed His Life in Two Weeks 33:08 - Should You Be Eating More Like Your Ancestors? 35:54 - Fast, Medium & Slow Fermenting Fibers: Why It Matters Where Fiber Ferments in Your Colon 40:47 - Psyllium Husk, Chia Seeds & What Most Fiber Supplements Get Wrong 41:57 - The Best Foods for Your Microbiome (According to the Doc Who Studies It) 43:14 - Cooked and Cooled Starch & Why Freezing Bread Actually Works 44:07 - The Truth About Colonics: Helpful or Harmful? 46:41 - Your Microbiome Can Change Within 48 Hours — Here's How to Start 48:01 - The Fiber Fart Curve: Why Gas Is a Good Sign You're Doing It Right 50:33 - Why the Rise in Colon Cancer Is Directly Tied to Fiber Deficiency 51:42 - Too Much Protein, Not Enough Fiber: How You Turn Gut Bacteria Into Gremlins 56:27 - The Book & Why He Never Wants Anyone to Die of Embarrassment Again Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0	Fiber can actually have an impact on your gut microbiome within 48 hours if you increase your fiber intake.
0:07.0	So what you eat today, you will see benefits rapidly.
0:10.0	Do not worry about resetting your whole life.
0:13.0	Just make a small change today, you will see benefits immediately.
0:17.0	We actually don't have a lot of long-term studies on keto, carnivore and that sort of fiber-deficient diet.
0:22.6	So if someone has a problem with fiber, but they feel it, that's not a problem with fiber.
0:27.6	That is a problem systemically in their gut.
0:30.6	I haven't actually even released this yet, and I was planning to make a video about it in the next couple of days.
0:35.6	What if everything you thought you knew about healthy
0:38.6	eating is only half of the story? You know, you're taking your fiber, you're eating your apples,
0:43.1	your oats, your chia seeds, and you feel okay. But what if okay is nowhere near what is actually
0:48.9	possible for you? And the part of your gut that really helps you thrive with health, you may
0:53.4	be leaving out completely unfed. My guest today, you probably saw him on TikTok or social media Dr. Karen Rajan. He's a surgeon, a gut health expert, and one of the most followed doctors on the internet. And he said something in this conversation that stopped me cold. You can eat 30 grams of fiber a day and still be making the wrong choice for your microbiome. Because it's not about how much fiber you eat, it's about where that fiber is fermenting in your colon. I bet you never heard of that. Or whether it's feeding the bacteria in the beginning, middle, or all the way at the end of it. Most people, most fiber, is only hitting one spot. We also get into why the future of your mental health might be
1:27.7	living in your gut. And why the rise of colon cancer young people is directly tied to what we stopped
1:33.5	eating. And why the protein obsession sweeping the fitness world and the health and wellness world
1:38.8	might actually be turning your gut bacteria into little gremlins. And the one breakfast swap
1:44.0	that Dr. Karen made two weeks ago
1:45.9	that in his words completely changes life. This is one of the episodes where you're going to
1:50.3	finish it and immediately want to reorganize your entire kitchen. Don't blame me. Just listen up.
1:55.0	Let's get into it. Dr. Karan, how are you? I'm good. Thanks for having me. You are all over social media. That's what I got to say first and foremost. I feel like I get a lot of people on the show here, but I feel like I've seen you more than anyone that I've gotten on the show before I met them. You pop up everywhere, TikTok and social, it's all throughout social media, Instagram, YouTube. What else am I missing? Yeah, you know what? Like, I also like
2:19.2	to create a little community as well. So I've been trying to work on my writing skills and a
2:24.4	newsletter over the last couple of years. I really enjoy that. Writing to a surgeon. Did you practice
	...

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