McCall McPhersonFounder, Modern Thyroid Clinic.

Gut Health & Perimenopause: The Inflammation Connection #shorts

4 May 2026 · 1 min

Watch on YouTube

1:20

In this short, the speaker explains how the perimenopause transition reshapes the gut microbiome and drives inflammation. Key points include a reduction in keystone bacteria such as Bifidobacterium and Lactobacillus and a rise in inflammatory microbial species. The speaker links these microbial shifts to increased oxidative stress and altered insulin sensitivity. He introduces the concept of immunosenescence—the aging of the immune system—and describes how a standard American diet, chronic stress, and toxin exposure can compromise the thin, single‑cell barrier of the small intestine, leading to hyperpermeability (leaky gut). This breach provokes an immune response, further amplifying systemic inflammation during perimenopause.

Chapters

And then this obviously impacts fat distribution. How does it impact inflammation, just tied to our gut microbiome in general? Yeah, so there's certain— so when we look at the key changes that we see as we're navigating this perimenopause transition, it's like number one, we get changes in diversification of keystone bacteria. So the bacteria that make up the bulk of the microbiome, so things like Bifidobacterium lactobacillus, we start seeing a reduction in them and an increase in inflammatory species. So that's kind of number one. Some of its changes and alterations in those microbial diversification. It's also, you know, shifts in oxidative stress. It's shifts in insulin, insulin sensitivity that all drive this. It's understanding that our immune system ages right along with us. And so when we talk about aging, we can't not talk about the immune system, which I'll be the first person to say that immunosenescence is a fancy way of describing the aging of the immune system. And when we look at, like, as an example, the small intestine is one cell layer thick. Guess what happens if we're eating a standard American diet, we're chronically stressed, we're exposed to a bunch of like chronic toxins, we open up the little lock and key mechanism of the protective barrier. And right alongside that is the immune system. So what happens when we develop leaky gut, which is a real thing, small intestinal hyperpermeability for those who want to hear the like technical vernacular, we provoke an immune response.