Friday Favorites: How to Keep Your Microbiome Healthy with Prebiotic Foods
NutritionFacts.org Video Podcast
Michael Greger, M.D. FACLM
4.8 • 951 Ratings
🗓️ 29 August 2025
⏱️ 4 minutes
🧾️ Download transcript
Summary
Transcript
Click on a timestamp to play from that location
| 0:00.0 | If you look at the classics, the most frequently cited articles in the scientific nutrition |
| 0:14.3 | literature, the original glycemic index paper comes out in number 10, cited more than a thousand |
| 0:20.0 | times, and learning about fruit |
| 0:21.5 | vegetables and cancer prevention was a hallmark, but hitting the top five cited more than 2,000 |
| 0:27.2 | times dietary modulation of the human microbiome introducing the concept of prebiotics. |
| 0:35.3 | Prebiotics are the food components that feed and nourish the good bacteria in our gut, |
| 0:39.5 | like fiber and resistant starch. |
| 0:41.8 | In general, eating high-fiber plant foods is a good foundation for a prebiotic-rich diet. |
| 0:48.3 | Once upon the time, fiber was just thought of as just an undigested component of foods, known only for |
| 0:55.2 | bulking up stools and keeping our bowels regular. |
| 0:59.0 | Then we discovered an array of receptors in the body in which fiber breakdown products |
| 1:03.4 | fit in like a lock and key. |
| 1:05.9 | We feed our good bacteria with fiber and they feed us right back, munching the fiber |
| 1:10.4 | and creating short-chain |
| 1:11.5 | fatty acids that get absorbed into our bloodstream and fit into these receptors that are expressed |
| 1:15.9 | on immune cells and generally mediate a direct anti-inflammatory effect. |
| 1:21.1 | So the reason for lower systemic inflammation in plant-based eaters may not just be due to the abundance |
| 1:26.1 | of anti-inflammatory molecules in plant foods due to the abundance of anti-inflammatory molecules |
| 1:28.3 | in plant foods or the avoidance of pro-inflammatory molecules in animal foods, |
| 1:33.3 | but from the production of anti-inflammatory molecules from scratch by our good gut bugs when we feed them fiber. |
| 1:40.3 | Just to give you an idea how protective fiber-rich foods can be, those randomized to get |
| 1:45.2 | advice to eat fiber-rich plant foods during radiation therapy for cancer didn't just experience |
... |
Please login to see the full transcript.
Disclaimer: The podcast and artwork embedded on this page are from Michael Greger, M.D. FACLM, and are the property of its owner and not affiliated with or endorsed by Tapesearch.
Generated transcripts are the property of Michael Greger, M.D. FACLM and are distributed freely under the Fair Use doctrine. Transcripts generated by Tapesearch are not guaranteed to be accurate.
Copyright © Tapesearch 2026.

