Ranking Gut Health Advice From Social Media (with Dr. Karan Rajan)
The Liz Moody Podcast
Liz Moody
4.9 • 3.2K Ratings
🗓️ 30 March 2026
⏱️ 50 minutes
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| 0:00.0 | We're all following all of the gut health advice on the internet and somehow our guts feel worse than ever. |
| 0:05.0 | We are bloated. We are constipated. And all of the videos that we're watching are contradicting each other. |
| 0:11.0 | Like, do we have a leaky gut? Should we be fiber maxing? Why does the fiber make us fart so much? |
| 0:17.2 | On the Lizmody podcast, we are always looking for real science that can actually change our lives. So today, we are ranking gut health advice from social media. The top ranking is S-tier, so that's going to be superior advice, the best of the best. And then it goes in order A, B, C, D, E, all the way down to F-tier, which is the advice that you definitely want to leave far behind. |
| 0:39.0 | I am joined today by Dr. Kern Rajan. |
| 0:41.1 | He is an NHS surgeon who trained at Imperial College London. |
| 0:44.5 | He has worked with the UN. |
| 0:45.7 | He has worked with the World Health Organization and the British Red Cross. |
| 0:48.8 | He has also helped over 11 million people with his mega popular social media and YouTube channels. The Telegraph called him the go-to expert for a generation. And after this conversation, I think you are going to understand why. This is part of our news series. We have already ranked fitness advice from the internet with Harley Pasternak. We ranked therapy advice with Lori Gottlie. We ranked nutrition advice. We ranked money advice. So scroll back so you don't miss any of those. |
| 1:11.7 | And then let me know in the comments what topic we should rank next. And also if you disagree with any of the rankings that we're about to get into here, I would love to hear that as well. Okay, Dr. Curran, let's dive right in. I have a TikTok I'm going to play for you. If you consume probiotic-rich foods like sauric, then the probiotics in sauric trout can help fill |
| 1:31.7 | your gut with good, healthy bacteria. |
| 1:34.4 | If you consume prebiatic foods like kiwi fruit, then the prebiotics in kiwi fruit can |
| 1:40.1 | help feed the probiotics from the saurkraut. |
| 1:43.5 | I recognize that voice because that's my boy Corey. |
| 1:45.9 | He's a friend. |
| 1:46.9 | So, yes, prebiotics from food, probiotics and fermented food all good. |
| 1:52.5 | The one caveat I'll add is that probiotic rich food or foods that are fermented |
| 1:58.4 | are not the same as probiotic supplements targeted for a |
| 2:01.7 | specific thing. So they're two completely different use cases. But yes, when you eat foods |
| 2:07.5 | that have synergies like prebiotic rich foods and fermented foods, you get that amplification |
| 2:12.4 | effect, S tier. S tier. Okay. In the world of fermented food, I was under the impression that each type of fermented food only has like a few different strains of bacteria. Is that true? And if so, is that bad because we're trying to get all of these different strains of bacteria? Yeah. So I wouldn't think of fermented food as a supplement where you're trying to get all of these targeted effects. You just don't know what you're |
| 2:35.4 | getting sometimes. So, for example, two different Greek yogurts could have slightly different |
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