Perimenopause and Your Microbiomes: The Missing Link Behind Dryness, Gut Issues & Recurrent Infections

If you’re in your 40s and your body has started to feel… different, you’re not imagining it.

• Maybe your eyes feel drier than they used to.

• Your mouth feels more sensitive.

• Your digestion isn’t as predictable.

• Or you’ve started dealing with things like recurrent urinary tract infections, vaginal discomfort, or bloating that seems to come out of nowhere.

And when you try to get answers? You’re often sent from one place to another.

• Eye drops for dry eyes.

• A cream for vaginal dryness.

• Antibiotics or antifungals for infections.

• Maybe a quick comment about “getting older.”

But no one is connecting the dots. Because these aren’t isolated issues.

They are different expressions of the same underlying shift happening in your body.

And that shift is deeply linked to your hormones - specifically, the gradual decline and fluctuation of estrogen during perimenopause.

How Perimenopause Affects the Microbiome

What Is the Microbiome?

The microbiome refers to the community of bacteria and other microorganisms living in and on your body - especially in areas like the gut, mouth, skin, and vaginal tract. These microbes play a key role in digestion, immunity, hormone balance, and inflammation.

What Most Women Aren’t Told About Perimenopause

Hormonal changes don’t just affect your cycle.

They influence every surface in your body that relies on moisture, protection, and microbial balance.

This includes:

• Your mouth

• Your gut

• Your vaginal and urinary tract

• Your eyes and nasal passages

• And even your ears (yes itchy ears are an estrogen problem!)

Each of these areas hosts its own microbiome - its own ecosystem of bacteria that plays a crucial role in:

• Protecting against infection

• Regulating inflammation

• Supporting immune function

• Maintaining tissue health and hydration

And here’s where it gets important: Estrogen helps maintain these ecosystems.

As estrogen begins to fluctuate and decline:

• Microbial diversity can decrease

• Protective bacteria become less dominant

• Tissues become thinner and drier

• Immune resilience at these surfaces weakens

This doesn’t usually happen overnight.

It’s gradual.

Subtle at first.

But over time, it can show up in ways that feel confusing, disconnected, and increasingly frustrating.

The 5 Microbiomes Affected by Perimenopause (Gut, Vaginal, Oral & More)

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1. The Oral Microbiome (Your Mouth)

Your mouth is the beginning of your digestive system - and it has its own delicate bacterial balance.

Estrogen plays a role in:

• Saliva production

• Blood flow to the gums

• Maintaining a healthy oral environment

As levels shift, many women notice:

• Bleeding or sensitive gums

• Bad breath

• Increased plaque

• A metallic taste

• New cavities

This isn’t just about brushing or flossing.

A disrupted oral microbiome can also send inflammatory signals down into the gut, influencing digestion and overall health.

2. The Gut Microbiome

Your gut microbiome is central to hormone balance, immunity, and inflammation.

One key player here is the estrobolome - a group of bacteria involved in metabolising and recycling estrogen.

When estrogen levels drop:

• Microbial diversity may decrease

• Inflammation can increase

• Estrogen detoxification becomes less efficient

This can contribute to:

• Bloating

• Food sensitivities

• Slower digestion

• Increased reactivity to stress

3. The Vaginal Microbiome

A healthy vaginal microbiome is typically dominated by protective bacteria that keep the environment slightly acidic.

Estrogen helps sustain this balance.

With lower estrogen:

• The vaginal environment becomes less acidic

• Protective bacteria decrease

• Opportunistic microbes (like yeast) can overgrow

This can lead to:

• Vaginal dryness

• Irritation or discomfort

• Increased risk of yeast infections or bacterial imbalance

4. The Urinary Tract Microbiome

Often overlooked, the urinary tract has its own microbiome - and it’s closely linked to vaginal health.

Protective bacteria decline, but most of all, tissues are degrading and allowing bacteria to settle:

• The urinary tract becomes more vulnerable

• The risk of recurrent UTIs increases

The urinary tract is closely linked to vaginal health—but the issue here is not just the microbiome itself.

With declining estrogen:

• The tissues of the urinary tract become thinner and more fragile

• The protective lining weakens

• This creates an environment where bacteria can adhere and grow more easily

This is why many women experience:

• Recurrent urinary tract infections

• Increased sensitivity or irritation

So while bacteria are involved, the root issue is tissue integrity and local immunity, both of which are estrogen-dependent.

5. The Nasal & Eye and Ear Microbiome (Your Mucosal System)

This is the part that surprises most women.

Your eyes and nasal passages are also part of your body’s mucosal immune system.

With declining estrogen, you may experience:

• Dry or irritated eyes

• Blurry vision

• Increased sensitivity (e.g. to screens or contact lenses)

• Nasal dryness or sinus issues

• Itchy ear canals

These are often dismissed as environmental - but they are also part of the same physiological shift.

Why These Symptoms Feel So Random

When you look at each symptom on its own, it doesn’t seem connected.

But when you zoom out, a pattern appears.

All of these areas rely on:

• Moisture

• Strong microbial diversity

• Balanced immune responses

And all of these are influenced by estrogen.

What you’re experiencing is not a collection of random problems - It’s a system-wide shift in resilience.

At first, this may show up subtly:

• Slight dryness

• Mild sensitivity

• Occasional digestive changes

Over time, if not supported, it can become more pronounced.

Q&A: Perimenopause and the Microbiome

Why does everything feel drier in perimenopause?

Estrogen plays a key role in maintaining hydration and tissue integrity across the body. As levels decline, moisture production decreases, and tissues become more vulnerable.

Can hormone changes really affect gut health?

Yes. Hormones and the gut microbiome are closely connected. Changes in estrogen can influence microbial diversity, inflammation, and how efficiently your body processes hormones.

Why am I suddenly getting more UTIs?

Lower estrogen leads to thinning of the urinary tract lining, making it easier for bacteria to adhere and grow. It’s not just about bacteria - it’s about reduced tissue resilience.

Why am I getting more yeast infections?

Changes in estrogen affect the vaginal environment, reducing protective bacteria and making the terrain less acidic and therefore making it easier for yeast to overgrow.

Are these changes immediate?

Not always. They often develop gradually and may start with subtle symptoms that become more noticeable over time.

Is this just part of aging?

It’s not simply aging - it’s a physiological shift that can be supported once you understand what’s happening in the body.

How to Support Your Microbiomes in Perimenopause

The goal isn’t perfection, it’s supporting your body’s natural resilience across all these systems.

1. Address the Root: Hormonal Support (Including HRT)

For many women, hormone replacement therapy (HRT) can be one of the most effective ways to support these changes at their root.

This may include:

• Systemic HRT (supporting the whole body)

• Local vaginal estrogen (for targeted support)

In some cases, practitioners may also explore local applications for specific symptoms under guidance.

The key is understanding what your body needs and using hormones strategically and safely.

If you want guidance on this, my Get HRT Right program and HRT strategy sessions walk you through exactly how to approach this in a personalised way.

2. Support Your Microbiome Through Food

What you eat directly feeds your microbiomes. Overall, diversity is important: the more different vegetables and seeds you eat, the better as they are all providing different kinds of fiber that will feed different bacteria in your gut. 

Focus on:

• Fibre-rich foods (vegetables, seeds, legumes and root veggies) provide pre-biotics to feed your good gut bacteria

• Polyphenol-rich foods (berries, herbs, olive oil)

• High-quality proteins

• Healthy fats, especially Omega 3 fatty acids

These help support microbial diversity, reduce inflammation, and stabilise hormones.

Inside my Hormone Balance Cookbook, I show you exactly how to do this in a practical, sustainable way.

3. Support Mucosal Health & Hydration

Beyond water, your body needs the right building blocks for healthy tissues.

This includes:

• Essential fatty acids

• Adequate mineral intake

• Nutrients that support skin and mucosal integrity

Some women also find support from targeted nutrients such as sea buckthorn oil, which has been studied for its role in supporting mucosal hydration.

4. Reduce What Disrupts Your Microbiomes

• Gluten is probably the worst thing you can do to your gut - it’s like sticky glue that can damage your gut lining

• Pesticides like glyphosate act as antibiotics in a sense that they are killing your good gut bacteria

• Harsh oral care products

• Processed sugars

• Frequent use of synthetic medication or antibiotic use (when avoidable)

• Chronic stress

Small changes here can have a surprisingly large impact.

5. Support Your Nervous System

Stress directly affects:

• Gut health

• Nutrient absorption

• Immune function

• Microbial balance

This is why I always say: finding ways to better manage your stress are one of the non-negotiables in perimenopause .

6. When You May Need Extra Support

If symptoms persist or feel more intense, it often points to deeper imbalances - such as gut dysfunction, microbial overgrowth, or detoxification challenges.

This is where a more personalised approach can make all the difference.

What I See Every Day in Practice

In my work, I see this pattern again and again.

When we start supporting the body at a foundational level - especially through nutrition - things begin to shift much more quickly than most women expect.

Simple changes like:

• Reducing processed sugar

• Removing or reducing gluten and dairy (where appropriate)

• Cutting back on alcohol

• Increasing fibre and nutrient density

…can already make a noticeable difference in:

• Digestion

• Energy

• Bloating

• And overall resilience

And often, it’s not about doing something extreme.

It’s about doing the right things consistently.

One client recently shared something that really stayed with me.

She came to me already eating what she thought was a very healthy diet - lots of vegetables, very mindful overall. But when we looked more closely, she realised she wasn’t actually getting enough fibre, and was relying quite heavily on fruit.

After making a few simple adjustments, she started including one of the recipes from my cookbook - a grain-free breakfast that’s rich in fibre and healthy fats.

She said: “I feel so good when I eat this. My digestion is just… easy. Everything works. No bloating, no discomfort. It’s actually kind of beautiful.”

And while that might sound like a small thing, it’s not.

Because when your digestion works well:

• Your microbiome is better supported

• Your inflammation levels tend to be lower

• Your hormones are easier to regulate

It’s all connected.

And this is exactly the kind of shift we’re aiming for - not perfection, but a body that feels supported and works with you again.

Don’t Know Where to Start?

If you’re wondering where to begin, food is one of the most powerful (and accessible) places to start.

Inside my Hormone Balance Cookbook, I show you exactly how to use everyday ingredients to support your gut, hormones, and microbiome - without overwhelm.

Because when you understand what your body needs, everything starts to make a lot more sense.