Understanding gut health, the gut-brain connection + why digestive symptoms can be more complicated than they seem
You've changed the diet. You're reading ingredient labels, adding more whole foods and perhaps you've tried probiotics, fibre, supplements or different approaches to help your child's digestion.
And yet the tummy aches keep happening. They're still constipated, bloated or uncomfortable, or you're simply not seeing the change you hoped all that effort would bring.
When you've already put so much energy into supporting gut health, it can be frustrating to feel like you're still missing a piece. The gut doesn't work in isolation. Digestion involves the digestive tract, nervous system, hormones, immune system, microbiome and many other processes working together. The relationship between the gut and brain is particularly fascinating, but it isn't as simple as saying that gut health “starts in the nervous system”.
Instead, communication travels both ways. So if probiotics alone aren't changing things, it may be time to look at the bigger picture.
Gut health can look different for every child
The obvious signs of digestive trouble are usually the easiest to recognise: constipation, diarrhoea, bloating, gas or recurring tummy pain.
But even those symptoms can have many different explanations.
Constipation, for example, is common in children and may be influenced by fluid and fibre intake, toilet habits, stool withholding, changes in routine, medications and, less commonly, an underlying health condition.
Recurring tummy pain can also have many causes, from constipation and infections to food intolerances and functional abdominal pain. Stress and anxiety can sometimes contribute to stomach discomfort too.
This is why it's worth resisting the temptation to place every symptom under the umbrella of “poor gut health”.
Eczema, frequent illness, sleep difficulties, picky eating, emotional changes or behavioural concerns might occur alongside digestive symptoms, but their presence doesn't automatically mean the gut is responsible.
Sometimes things overlap. Sometimes they don't.
The brain + gut are constantly talking
One of the most interesting areas of health research is the gut-brain axis.
Your digestive system has its own extensive network of nerves, known as the enteric nervous system, and it communicates with the brain through neural, hormonal, immune and metabolic pathways.
The vagus nerve is one of the pathways involved in this communication.
But importantly, the conversation isn't one-way.
The brain can influence digestion, while signals from the digestive system and gut microbiome can also influence the brain. Current research describes this as a bidirectional relationship, rather than the brain speaking first and the gut simply responding.
You may have experienced a simple version of this yourself. Feeling nervous can give you “butterflies” or change your appetite, while being hungry or uncomfortable can certainly influence your mood.
The gut and brain are continually exchanging information.
So, can stress affect digestion?
Yes, it can. The autonomic nervous system helps regulate digestive processes, and stress can influence things like appetite, gut sensitivity and bowel habits.
That doesn't mean digestive symptoms are simply the result of a nervous system being “stuck in stress mode”, though.
If your child regularly experiences constipation, abdominal pain, diarrhoea or other digestive concerns, there may be dietary, behavioural, gastrointestinal, psychological or medical factors worth considering.
Understanding stress can be one part of the conversation without making it the explanation for everything.
What about the “Perfect Storm”?
At Restore, we sometimes use The Perfect Storm as an educational framework for exploring the different experiences that form part of a child's history.
For gut health, that history might include pregnancy and birth, early feeding, illness, antibiotic exposure, diet, sleep, stress and other environmental or lifestyle factors.
Researchers are particularly interested in how the gut microbiome develops during childhood. Factors including mode of birth, feeding, antibiotics, diet and environment can influence microbial composition, although we're still learning what those differences mean for an individual child's long-term health.
What we don't want to do is turn these associations into certainty.
A caesarean birth doesn't mean a child will develop gut problems. Antibiotic use doesn't guarantee future allergies, asthma or inflammatory disease. And digestive symptoms aren't proof that a child's microbiome or nervous system has been damaged.
The history gives us context, not a diagnosis.
Why might probiotics stop feeling like the answer?
Probiotics are often talked about as though they're one universal solution for gut health.
In reality, the microbiome is incredibly complex, and probiotic products can contain different organisms, strains and doses. Research into probiotics and the gut-brain axis is growing, but there is still plenty we don't know, particularly about which interventions are useful for specific children and conditions.
If probiotics haven't changed your child's symptoms, it doesn't necessarily mean their gut is “too damaged” for them to work or that something upstream needs to be repaired first.
It may simply mean the symptoms have another contributor, the particular probiotic isn't relevant to the problem, or your child needs a more individual assessment.
Sometimes the plateau itself is useful information. Instead of adding another supplement, it might be time to ask a different question.
What else should we look at?
Start with the symptom that's actually happening.
If constipation is the concern, look at bowel habits, fluid and fibre intake, stool withholding and whether going to the toilet has become uncomfortable or stressful.
If it's recurring abdominal pain, consider when it happens, whether it's associated with food or bowel movements, how long it lasts and whether there are other symptoms.
If you're concerned about restricted eating, allergies, intolerances or nutrition, a GP or Accredited Practising Dietitian can help determine what deserves further investigation.
For persistent digestive symptoms, your GP may also consider whether conditions such as coeliac disease, food allergy or another gastrointestinal condition need to be explored.
Rather than assuming every gut symptom has the same root cause, the goal is to understand your child's particular pattern.
Where might chiropractic fit?
Because the nervous system and digestive system communicate closely, it’s understandable that families are often curious about where chiropractic fits into the gut-health conversation.
At Restore, our focus is the neuro-musculoskeletal system. We look at things like joint movement, muscle function, physical tension and other findings that are relevant to chiropractic care.
If your child is experiencing ongoing digestive symptoms, their GP and other appropriately qualified practitioners remain important for investigating what may be contributing. Where there are also musculoskeletal findings relevant to chiropractic care, our chiropractors can assess and support those as one part of the broader picture.
It’s less about viewing chiropractic as the answer to a gut problem, and more about understanding your child as a whole and making sure each part of their care is being supported by the right practitioner.
What about INSiGHT Scans + the vagus nerve?
At Restore, INSiGHT technology may be used as one part of a chiropractic assessment.
Depending on the scan, we can collect information relating to muscle activity, skin temperature patterns and heart rate variability (HRV).
Because HRV is influenced in part by autonomic activity, it can provide information relating to the autonomic nervous system. But it isn't a gut health test.
INSiGHT Scans don't diagnose digestive conditions, microbiome imbalance or “vagus nerve dysfunction”, and they can't tell us whether your child is absorbing nutrients properly or why they're constipated.
Instead, any scan findings are considered alongside the child's history and physical examination when assessing what's relevant to chiropractic care.
You're already doing plenty of the good stuff
If you're already putting thought into your child's food, movement, sleep and daily routines, none of that effort is wasted.
Nutrition matters. Fibre and fluids matter. Movement matters. Sleep matters. And when a specific probiotic or supplement has been recommended for a clear reason by an appropriately qualified practitioner, that may have a place too. But you don't have to keep stacking one gut-health strategy on top of another when your child is still struggling.
Sometimes the most useful next step isn't another supplement. It's getting curious about the symptom that's actually there, looking at the broader picture and finding the right practitioner to help investigate it.
For persistent constipation, recurring tummy pain, diarrhoea, blood in the stool, poor growth or other ongoing digestive concerns, speak with your child's GP. Urgent assessment is appropriate when significant abdominal symptoms occur alongside concerning signs such as severe pain, fever, vomiting or blood in the stool.
Your child's gut is part of an incredibly interconnected system. Understanding that connection can be useful without needing to make the nervous system the cause, or the cure, for everything.
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Important information: This article provides general educational information only and isn't intended to diagnose or treat digestive, immune, skin, behavioural or other health conditions. Chiropractic care doesn't replace appropriate medical, nutritional or allied health assessment. If your child has persistent or concerning digestive symptoms, speak with your GP or another appropriately qualified healthcare professional.
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Healthdirect Australia. Constipation in children.
Healthdirect Australia. Abdominal pain in children.
Raising Children Network. Constipation in babies and children.
Raising Children Network. Stomach pain or ache: children and teenagers.
Australian Health Practitioner Regulation Agency (AHPRA) & Chiropractic Board of Australia. Check your advertising: Chiropractic examples.
Current scientific literature. Research into the paediatric microbiota-gut-brain axis and bidirectional gut-brain communication.
Original Article
Adapted from Why Probiotics Alone Aren't Working, originally published by PX Docs.