If your child struggles with eczema, recurrent ear infections, constipation, behavioural challenges, or just seems to get sick more than other kids, you may have tried everything and still feel like you're missing something.
That missing piece might be living in their gut.
What Is the Gut Microbiome and Why Does It Matter for Kids?
Your child's gut is home to trillions of microorganisms including, bacteria, yeasts, and viruses that together make up what's called the gut microbiome. Far from being just a digestive organ, the gut microbiome plays a central role in:
- Immune development — up to 70% of the immune system is housed in the gut
- Allergy and eczema risk
- Digestion and nutrient absorption
- Bowel habits and comfort
- Fussy eating and overeating
- Mood, behaviour, and sleep regulation
The first three years of life are the most critical window for microbiome development. During this time, the microbiome is rapidly expanding and is highly shaped by what happens to your child and in many cases, what happened even before they were born.
How Does a Child's Microbiome Get Disrupted?
Here's something that surprises many parents: some of the most influential factors happen long before you even know what a microbiome is.
Risk factors that can affect gut development include:
- How your baby was born — a caesarean birth changes the bacteria a baby is first exposed to
- Feeding history — breastmilk contains special sugars (called Human Milk Oligosaccharides) that selectively feed beneficial gut bacteria in a way no other food can replicate
- Antibiotic exposure — in pregnancy, during delivery, or in early childhood. Even a single course can temporarily reduce beneficial bacteria
- Early diet — what and how much variety your child eats has a profound effect on microbial diversity
- Stress and sleep — a child's nervous system and gut are deeply connected; when one is dysregulated, the other often follows
This doesn't mean anything is "wrong" with you or your child. Many of these factors are unavoidable. But understanding them allows us to build a plan that supports recovery and resilience.
The Gut–Condition Connection
So what can actually stem from gut imbalance in children? Research and clinical experience increasingly link disrupted gut health to:
- Eczema and skin conditions
- Food allergies and intolerances
- Recurrent infections (ear, chest, throat, sinus)
- Constipation or loose, irregular stools
- Colic and reflux in infants
- Sleep disruption
- Behavioural challenges, irritability, or sensory sensitivity
- Poor appetite or very picky eating
This doesn't mean the gut is always the cause — but in many cases, it's a significant contributing factor that's being missed.
What Does a Paediatric Microbiome Assessment Actually Look Like?
As a Certified Paediatric Microbiome Clinician trained by Dr Brad Leech, I take a thorough, evidence-informed approach to understanding your child's gut health from the very beginning of their life.
This includes a detailed early-life history, including, looking at pregnancy, birth, feeding, antibiotic use, diet, and current symptoms, to build a complete picture of what may have shaped your child's microbiome and where support is most needed.
From there, I work with you to create a personalised, gentle plan. This might include:
- Diet and food diversity strategies — practical, family-friendly ways to build a more resilient microbiome through food
- Age-appropriate probiotics and prebiotics — targeted to your child's specific needs, not a one-size-fits-all approach
- Lifestyle support — sleep routines, outdoor time, nervous system regulation, and reducing unnecessary chemical exposures
- Microbiome testing when appropriate, to see exactly what's happening in your child's gut and guide more targeted treatment
The goal is never perfection. It's building a healthier foundation, one that can make a real difference to how your child feels, functions, and thrives.
It's Never Too Late to Start
One of the most reassuring things I share with parents is this: the gut microbiome is flexible and responsive, especially in early childhood. Support at any stage can make a meaningful difference.
You are not late. You haven't missed the window. And knowing how your child's body works — and how to support it — is one of the most powerful things you can do for their long-term health.
If you've been searching for answers to your child's recurring symptoms, or you simply want to give their health the best possible start, I'd love to help.
📅 Book a consultation with Rachel today — and let's look at what your child's gut might be trying to tell us.
Also for the grown-ups: I have also completed Dr Brad Leech's Complete Gut Health Course. If you'd like personalised, evidence-informed gut health support for yourself, please don't hesitate to book in — your gut health matters just as much as your child's.
Rachel van der Velden is a Student Naturopath and Certified Paediatric Microbiome Clinician, trained by Dr Brad Leech.