Why Fixing Your Gut May Help Balance Your Hormones Naturally

If you’ve been working hard on your nutrition and your digestion, but still feel like your hormones are doing their own thing — mood swings, PMS, fatigue, irregular cycles, or that general feeling of being “off” — you’re not imagining it. And the answer might be hiding in your gut.

As a Naturopathic Doctor focused on hormonal health, one of the most common patterns I see in my practice is this: someone comes in with clear hormonal symptoms, they’ve done a lot of the right things nutritionally, and their gut is still the missing piece of the puzzle. Not because they haven’t tried, but because the gut-hormone connection often doesn’t get talked about in enough depth.

So let’s change that.

Your Gut Is a Hormone Processing Centre

Most people know the gut is involved in digestion and immunity. But fewer people realize it also plays a direct role in how your hormones are metabolized, cleared, and reabsorbed. Your gut doesn’t just process food — it processes hormones too.

Here’s how it works: after your liver metabolizes estrogen (and other hormones), it packages them up for excretion through the bile into the digestive tract. From there, they’re supposed to leave the body through your stool. Simple enough. But if your digestion is sluggish, your microbiome is imbalanced, or you’re chronically constipated, that estrogen doesn’t always make it out. Instead, it gets reabsorbed back into circulation — meaning your body is re-exposing itself to hormones it was already trying to clear.

The Estrobolome: The Gut Bacteria That Manage Your Estrogen

There’s a specific community of gut bacteria called the estrobolome — and its job is to help regulate estrogen metabolism. When your microbiome is diverse and healthy, these bacteria produce the right amount of an enzyme called beta-glucuronidase, which helps balance how much estrogen gets excreted versus reabsorbed.

When the microbiome is disrupted — from antibiotics, a low-fiber diet, chronic stress, or dysbiosis — beta-glucuronidase activity can go out of range in either direction, affecting estrogen clearance and contributing to hormonal symptoms.

This is one of the reasons why gut health and hormonal health are genuinely inseparable. And it’s also why fiber is one of the most powerful tools you have — it feeds the beneficial bacteria in the estrobolome and physically binds to estrogen to help move it out of the body.

Cortisol and Your Gut: A Two-Way Street

It’s also worth talking about the stress piece here, because cortisol and gut health have a bidirectional relationship that makes each one worse when the other is off.

Chronic stress raises cortisol, and elevated cortisol directly impacts gut motility, increases intestinal permeability (leaky gut), and disrupts the microbiome. On the flip side, gut inflammation and dysbiosis can activate the stress response and keep cortisol elevated. It’s a loop — and once you’re in it, it’s hard to know which came first.

I wrote more about how cortisol affects your hormones, digestion, and energy over on my blog — it’s a great read if you suspect stress is a factor for you. Read it here.

Signs Your Gut Might Be Affecting Your Hormones

You don’t need a formal diagnosis to notice these patterns. Here are some signs the gut-hormone connection might be relevant for you:

PMS or mood changes that feel disproportionate to what’s going on in your life
Bloating that’s worse in the second half of your cycle
Constipation or irregular bowel movements
Heavy or irregular periods
Fatigue that doesn’t resolve with sleep
Skin changes like acne or dullness that track with your cycle
A history of antibiotic use or a gut health concern that was never fully resolved

None of these on their own confirm an estrobolome issue, but together they’re worth paying attention to.

What Actually Helps

The good news is that supporting the gut-hormone connection doesn’t require dramatic intervention. Some of the most effective strategies are the same foundations Kim talks about often: eating close to whole foods, supporting digestion naturally, and building habits that reduce the overall load on your body.

A few things worth prioritizing specifically for the hormone piece:

Fiber, consistently. Aim for 25-30 grams daily to support estrogen clearance, feed beneficial gut bacteria, and regulate bowel movements. Ground flax and chia seeds are particularly useful because they also contain lignans, which support healthy estrogen metabolism.

Regular bowel movements. If you’re not having at least one solid bowel movement daily, estrogen and other metabolized hormones have more time to be reabsorbed. Hydration, fiber, and movement are your first tools here.

Reduce gut inflammation. Processed foods, alcohol, and chronic stress all contribute to gut inflammation that can disrupt the estrobolome. You don’t have to be perfect, but consistent choices matter more than occasional ones.

Support your microbiome diversity. Fermented foods, a variety of plant foods, and managing stress all help. A targeted probiotic can also be useful, but which strains and doses matter — this is something worth discussing with a practitioner rather than just picking something off the shelf.

Address stress as a gut issue. This is often the piece people miss. If your nervous system is chronically activated, your digestion won’t work the way it’s supposed to — no matter how good your diet is. Breathwork, consistent sleep, and daily recovery practices make a real difference here.

When to Dig Deeper

Lifestyle changes are a powerful starting point. But if you’ve been working on your gut health for a while and your hormonal symptoms aren’t shifting, it may be worth looking at the full picture. As a Naturopathic Doctor, I run comprehensive blood work and functional hormone testing to understand what’s actually happening — not just what’s “normal” on a standard panel. Understanding your estrogen metabolism, progesterone levels, thyroid function, and microbiome health together gives us a real strategy rather than guesswork.

If this resonates and you’re ready to stop treating symptoms in isolation, a good first step is taking Dr. Margot’s free “Why Am I Always Tired?” quiz — it’s designed to help you identify which hormones might be out of balance and where to focus. From there, a discovery call can help you map out next steps.

About the Author

Dr. Margot Lattanzi is a Naturopathic Doctor practicing at Body Co clinic in Toronto’s West End, and virtually across Ontario. She specializes in hormonal health, perimenopause, fatigue, and digestion through her signature Hormone Cornerstone Method — a root-cause framework connecting the six key systems that influence hormonal balance. Learn more at doctormargotnd.com or follow her on Instagram @doctormargotnd

Disclaimer: Any information is for informational purposes only and is not intended to be used in place of professional medical advice. Always seek the advice of a qualified health care practitioner with any questions or health concerns you may have and before starting any new treatments (including supplements).