826: The Menopause-Gut Connection: Stopping LPS Toxins, Fixing Leaky Gut, and Hacking Aging
Beauty Bytes with Dr. Kay: Secrets of a Plastic Surgeon™
Kay Durairaj, MD, FACS @beautybydrkay
4.9 • 608 Ratings
🗓️ 29 April 2026
⏱️ 55 minutes
🧾️ Download transcript
Summary
Are your expensive 10-step skincare routines actually destroying your skin’s first line of defense? In this mind-blowing episode of Beauty Bytes, I welcome back Kiran Krishnan, a brilliant research microbiologist and health educator, to completely redefine how we think about the gut-skin axis.
We start by breaking down the "acid mantle"—why your skin must stay at a highly specific pH (4.5 to 5.2) to prevent fungal overgrowth, acne, and severe dryness, and why you are likely over-cleansing. We also dive into the systemic changes that occur during midlife, exploring how declining estrogen levels create a "leaky gut" that allows LPS toxins to flood your system, accelerating aging and inflammation. Kiran shares the exact protocols to reverse this, from using spore-based probiotics and lactoferrin to hacking the "centenarian microbiome" with fiber and polyphenols. We even discuss "psychobiotics" that act as nature's stress relievers, and the exact topical protocol you should use after microneedling and lasers.
Guest Information: Kiran Krishnan is a research microbiologist and the co-founder of Microbiome Labs. You can find him on Instagram at @kiranbiome or join his free community at biome.lc. To learn more about the SIV skin serum, visit sivcare.com.
Transcript
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| 0:00.0 | Well, hello, hello, guys. You're listening to Beauty Bites with Dr. K, secretsrets of a Plastic Surgeon, and I have some secrets for you. |
| 0:23.6 | Today we're going to talk about the microbiome and why it is a hot topic. We have a really amazing expert. |
| 0:31.5 | Kieran Krishnan came on the podcast date. Maybe it was about two years ago, blew my mind, and the science has exploded so much since then. |
| 0:38.7 | Kieran is a research, microbiologist, health and wellness expert, entrepreneur, and educator. |
| 0:43.7 | He spent two decades, the last two decades, translating this complex science of microbiomes into, like, strategies you could actually use. |
| 0:51.8 | He co-founded microbiome labs. |
| 0:54.1 | He has published research, |
| 0:55.4 | scientific textbooks, and global patents in the microbiome space. So today we'll talk about skin |
| 1:01.1 | microbiome. What is the acid mantle and why is it so important? How microbes help your |
| 1:07.0 | skin barrier? And what about skin dysbiosis? How does that lead to all these problems we have, like dermatitis, allergies, food problems, probably even aging. Welcome to the podcast, Karen. Thank you so much for having me. It's wonderful to be back. Shall I call you Dr. Krishnan or shall we stick with Karen? No, Karen is perfect. Thank you. Karen and Kay are going to have a little chat. |
| 1:27.7 | So for listeners who are new to the whole entire concept of skin, microbiome in general, |
| 1:33.5 | why should they care about it? You know, it's a really profound concept, right? So we've all known, |
| 1:41.6 | for example, we just take the skin itself, forget the gut microbiome |
| 1:45.4 | for a moment, which is really complex and very impactful in your overall health. But let's look at the |
| 1:50.8 | skin. The skin is known to be the largest organ in the body. We've always thought of it as just this |
| 1:55.9 | barrier that prevents things from going out and things from going in from the outside world. |
| 2:01.6 | But now we come to know that the skin is much more dynamic than that, right? |
| 2:05.8 | There's this neuroimmune endocrine access related to the skin. |
| 2:10.9 | The skin is really an amazing sensory and signaling organ that indicates to the inside of your body all of these things that are going |
| 2:18.8 | on on the outside. And then your immune system response, your hormones response to it and so on. |
| 2:25.1 | And at the end of the day, all of those things, all of those functions are dictated in large |
| 2:30.9 | part by the microbes that are present on the skin. It's a 35 to one ratio of skin cells |
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