Written by Clinical Nutritionist, Sofie Beker
So, what is the microbiome?
The gut microbiome is one of the most important (and underestimated) systems in your body. It’s not just about breaking down food; it influences your immune system, hormones, metabolism, and even how you feel mentally.
If you’ve been dealing with bloating, skin issues, or low energy, understanding why gut microbiome matters can completely change how you approach your health.
Digestion and the microbiome
Your gut microbiome is made up of trillions of microorganisms living in your intestines. Their main job? Helping you break down food and extract nutrients.
This is where gut microbiome and digestion become critical. These bacteria:
- Ferment fibre into short-chain fatty acids (key for gut lining health)
- Help absorb nutrients like magnesium, zinc, and B vitamins
- Support gut motility
When this system is off, you might notice:
- Bloating after meals
- Gas
- Food intolerances
- Irregular bowel movements
Even if you’re eating well, poor microbiome function means you’re not fully benefiting from your food.
Gut bacteria and immunity: your first line of defence
Around 70% of your immune system is located in your gut — and your microbiome plays a major role in regulating it.
Research shows that gut bacteria interact directly with immune cells and help control inflammation and immune responses.
When your microbiome is balanced:
- It protects against harmful pathogens
- It regulates inflammation
- It supports immune tolerance
When it’s disrupted:
- You may experience chronic inflammation
- Increased sensitivity to foods
- Skin flare-ups (acne, eczema, rosacea)
- Frequent colds, flus or infections
- Allergy or hay fever symptoms
This is one of the biggest reasons why gut microbiome matters in long-term health.
Hormones, metabolism and the microbiome
Your gut is deeply connected to your hormones; something most people overlook.
The microbiome hormones connection works through:
- Regulation of oestrogen metabolism
- Influence on appetite hormones (like GLP-1!)
- Impact on blood sugar and insulin sensitivity
In fact, gut bacteria directly influence hormone-secreting cells in the intestines and affect metabolism and energy balance.
When this system is off, you might see:
- Hormonal acne
- PMS or PMDD symptoms
- Heavy or painful periods
- Weight gain or weight loss resistance
- Thyroid dysfunction
This is why focusing only on the symptoms, calories, or movement often isn’t enough.
The microbiome and mood: the gut-brain connection
This is where things get really interesting.
Your gut communicates directly with your brain through what’s called the gut-brain axis. The microbiome plays a key role in producing neurotransmitters like serotonin, dopamine, and GABA.
That’s why the microbiome and mood connection is so strong.
An imbalanced gut can contribute to:
- Anxiety
- Low mood
- Brain fog
- Poor stress resilience
This isn’t just “in your head”, it’s a physiological connection.
Signs you may not have a healthy microbiome
You don’t always need testing to start noticing patterns.
Some common signs of an imbalanced healthy gut bacteria include:
- Bloating or discomfort after eating
- Skin issues
- Fatigue or brain fog
- Sugar cravings
- Irregular digestion
- Mood swings or worsening PMS
These are often early signs that your microbiome needs support.
Simple ways to support your microbiome
You don’t need to overcomplicate this. In practice, I always focus on simple, sustainable habits first.
Here’s where I usually start with clients:
- Prioritise whole foods. Focus on vegetables, fibre-rich foods, healthy fats and quality protein.
- Increase food diversity. Different bacteria thrive on different foods. An easy goal is to aim for 30-40 different plant foods per week. This is one of the easiest ways to improve microbiome resilience.
- Support digestion first. Before adding supplements, eat slowly, chew properly, and avoid eating on the run or while you’re stressed. This alone can improve symptoms!
- Be strategic with supplements. Not everyone needs probiotics right away. In some cases, introducing them too early can worsen symptoms if the gut environment isn’t ready. A personalised approach always works better.
Why gut microbiome function matters more than you think
Your gut microbiome function affects nearly every system in your body.
When it’s supported, you’ll often notice:
- Better digestion
- More stable energy
- Clearer skin
- Improved mood
- Balanced hormones
This is why gut health is often the foundation of everything else I work on with clients
Want to know more?
If you’re ready to get to the bottom of your gut symptoms for good, contact us or book a consultation today and start your journey to better health.
