Are You Eating Enough Fiber? Science-Backed Secrets for Gut Health & Longevity

The Proof with Simon Hill

Simon Hill

Nutrition, Health & Fitness, Self-improvement, Education

4.9 • 2.9K Ratings

🗓️ 11 August 2025

⏱️ 158 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

In this masterclass, I break down the science of gut health and how to use it to your advantage. You’ll learn the different types of fiber, the benefits of fermentation, and how your gut microbes influence digestion, immunity, and even mood. Plus, I share practical tips for increasing fiber without discomfort and simple ways to nurture a thriving microbiome. Want to support the show? The best way to support the show is to use the products and services offered by our sponsors. To check them out and enjoy great savings, visit theproof.com/friends. You can also support the show by leaving a review on the Apple Podcast app and sharing your favourite episodes with friends and family. This episode is brought to you by: 38TERA Consider 38TERA's DMN prebiotic supplement a daily multivitamin for your gut. Formulated by yours truly and gastroenterologist Dr Will Bulsiewicz. Use code THEPROOF for a discount at checkout. Function Health Track, optimise, and thrive with Function Health. Access 100+ lab tests – five times more than a typical physical – including ApoB and LP(a), no doctor approval needed. Get science-backed insights and track your results over time. Join me on the path to next-level health optimisation at functionhealth.com/simonhill. Only available to those living in the United States. Shopify Shopify, the world's leading e-commerce platform, helps you turn browsers into buyers with the internet’s best-converting check out–up to 36% better compared to other leading e-commerce platforms. To boost your conversion rate, and grow your business, sign up for a one-dollar-per-month trial period at shopify.com/proof. Eight Sleep Upgrade your sleep with the Pod 5 Ultra by Eight Sleep. Clinically validated to deliver up to 1 extra hour of quality sleep per night through temperature control and biometric tracking. Use code THEPROOF for $350 off at eightsleep.com/theproof. Try it risk-free for 30 days, with worldwide shipping. Fireflies Stay focused and let Fireflies handle the notes. From transcriptions and summaries to real-time voice commands, Fireflies turns your meetings into actionable insights, seamlessly integrating with Zoom, Google Meet, Slack, and more. Sign up for a yearly plan and get two months FREE at fireflies.ai/theproof. WHOOP Whoop, the most advanced fitness and health wearable available. Your personalised fitness and health coach to recover faster, sleep better, and train smarter. Claim your first month free on join.whoop.com/simon. Simon Hill, MSc, BSc (Hons) Creator of theproof.com Host of The Proof with Simon Hill Author of The Proof is in the Plants Subscribe & Connect: YouTube Apple Podcasts Spotify Instagram: @simonhill Twitter: @theproof Facebook: The Proof with Simon Hill Nourish your gut with my Plant-Based Ferments Guide and download my Two-Week Meal Plan.

Transcript

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0:00.0	Howdy friends, welcome back to The Proof. I'm Simon Hill and today we are talking about one of the most
0:06.7	powerful tools for better health, and that is fiber. Your gut microbiome, which is the trillions of
0:14.0	microbes living inside you, affects everything from digestion, immunity, metabolism and even your brain.
0:20.4	And fiber is their favorite fuel.
0:22.9	In this masterclass, I've pulled the best insights from world leading experts, plus practical
0:27.9	tips from myself to show you how to feed your gut, protect it from harm, and unlock
0:33.2	its full potential. Let's get into it.
0:42.8	Did you know you're only half human? It's true,
0:48.2	your body contains roughly the same number of microbial cells as it does human cells. But these microbes, specifically bacteria, viruses, fungi and archaea are not invaders.
0:54.6	They are your most powerful health allies.
0:57.1	Which brings us to the first definition today, the microbiome.
1:00.9	Your gut microbiome is not just a collection of bacteria.
1:04.2	It's a dynamic ecosystem, a rainforest of these microorganisms, bacteria viruses, fungi,
1:10.5	and archaea.
1:11.6	Primarily residing in your large intestine or colon, this community is incredibly diverse, with each
1:17.6	microbe playing a very specific role in your health.
1:20.6	So let's explore exactly how they do that, starting with your immune system.
1:24.6	Firstly, microbes educate our immune system, more than teachers. Think of
1:29.8	them as scholars, training your immune system to distinguish between harmful pathogens and friendly
1:37.0	microbes, helping to balance immune responses and reducing autoimmunity. Second, they protect your gut barrier.
1:45.0	Microbes ferment or consume indigestible parts of our food that escape digestion
1:50.0	in our small intestine and pass into our large intestine, producing specific fats,
	...

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