Axis-brain axis: what is it and why does it matter
A scientific guide for parents and anyone who wants to understand the connection between digestion and mind.
Do you know why your stomach gets nervous when you're nervous? Or why can bad digestion ruin the whole day — and vice versa, why do you feel more satisfied and calm after a good meal? The answer lies in one of the most interesting discoveries of modern science: the intestine-brain axis.
In this article, you will learn what the intestine-brain axis actually is, how it works, why it is especially key for children with an autism spectrum disorder (ASD), and what you can do specifically to support it.
1. What is a gut-brain axis?
bowel-brain axis (English Gut-Brain Axis) is a bidirectional communication system between the digestive tract and the central nervous system. In other words — your intestine and brain are constantly talking, through nerves, hormones and the immune system.
This communication channel is so sophisticated that scientists today call the intestine 'second brain'. And quite rightly so:
The connection ensures vagus nerve (Nervus vagus) — Direct highway between the intestine and the brain. The intestinal microbiome affects the production of neurotransmitters such as dopamine, GABA or acetylcholine.
Research published in a journal Nature Reviews Neuroscience They show that intestinal bacteria can directly influence behavior, mood and cognitive functions. A microbiome is not just about digestion — it's about your whole life.
2. How does the bowel-brain axis work?
Communication takes three main ways:
🧠 a) Nervous way — vagus nerve
The vagus nerve is the longest nerve in the body and serves as a direct connection between the intestine and the brain. It transmits signals in both directions: the brain sends instructions to the intestine (for example, under stress, it slows down digestion), and the intestine, in turn, informs the brain about its condition. it is estimated that up to 80% of the information travels from the gut to the brain, not the other way around.
💊 b) Hormonal path
the gut is the largest endocrine organ in the body. It produces dozens of hormones that affect appetite, mood and stress. A key example is serotonin — although you know it as a "hormone acting in the brain", the vast majority is produced in the intestine.
🛡 c) Immune Path
Approximately 70-80% of the immune system It resides in the intestinal mucosa. The intestinal microbiome regulates inflammatory processes throughout the body — including the brain. Today, chronic inflammation of the intestines is associated with depression, anxiety and neurological disorders.
3. Why is the bowel-brain axis so important for children with ASD?
This is a topic that is especially close to us at Neuronwell. It was the experience of parents of children with autism spectrum disorder that led us to start seriously dealing with this issue.
For a long time, research shows that children with ASD have a significantly different composition of the middle microbiome compared to their neurotypical peers. What does this mean in practice?
- Digestive difficulties are extremely common in children with ASD. Constipation, diarrhea, bloating or abdominal pain are an estimated 30-70% of children with autism. It is not a coincidence — it is a direct consequence of the imbalance of the microbiome.
- Intestinal imbalance may intensify PAS symptoms. Studies suggest that inflammatory processes caused by the wrong microbiome can negatively affect behavior, concentration and sensory processing.
- Modifying the microbiome can bring significant improvement. More and more parents and experts are experiencing positive changes in behavior and digestion after targeted care for intestinal health.
- Permeable intestines ("leaky gut") are twice as common in children with ASD than other children. Substances that would normally not let the intestine go any further, enter the bloodstream and cause systemic inflammation.
"After three quarters of a year of using Distiller and Gutox, our boy with ASD has no problems with constipation. Thank you."— Jana N., mother of a boy with a passport
4. What disturbs the intestine-brain axis?
The modern lifestyle is a challenge for the intestinal microbiome every day. The most common intruders include:
💧 Poor quality water
Chlorine and heavy metals in tap water can negatively affect intestinal bacteria.
🍟 Industrially processed food
Artificial ingredients, preservatives and sugar selectively destroy beneficial bacteria.
💊 Antibiotics
They are necessary for bacterial infections, but at the same time they destroy a large part of the intestinal microbiome without distinction.
😟 Chronic stress
Through the vagus nerve, it directly disrupts the intestinal peristalsis and the composition of the microbiome.
🥣 Lack of fiber
Intestinal bacteria feed on fiber. Without it, they gradually die.
☢ Toxins from the environment
Pesticides, heavy metals and chemicals from plastics damage the intestinal mucosa.
5. How to support the intestine-brain axis? Practical Guide:
The good news is that the intestinal microbiome is exceptionally adaptable. Targeted care brings results relatively quickly — sometimes within a few weeks.
💧 Step 1: Cleanliness of inputs — quality water
Start with the base: the water you drink. Regular tap water contains chlorine, drug residues and, in some areas, heavy metals. Distilled water completely removes these substances and provides a clean environment for the intestinal bacteria. The solution to this problem can bring you our Distiller by Neuronwell.
Product: Distiller by Neuronwell🌿 Step 2: bowel detox
Before restoring the microbiome, it is advisable to gently clean the intestine from deposits of toxins, heavy metals and dead mucous membranes. That's what it serves Gutox — 100% organic preparation composed of natural substances with detoxifying effects. Popular especially with parents of children with ASD.
Product: Gutox — 100% organic preparation🌿 Step 3: Support and recovery of the microbiome
gutherb It combines synergistic herbs that support the natural balance of the intestinal environment, stimulate peristalsis and create conditions for the development of beneficial bacteria.
Product: Gutherb🍊 Step 4: Total nutrition and antioxidants
The intestinal microbiome needs enough nutrients and protection against oxidative stress to function. Here they play a role Acerola (Natural vitamin C in high concentration) and Shilajit (Mountain adaptogen with proven regenerative effects).
Products: Acerola + Mumio⚡ Step 5: Reduction of inflammation — molecular hydrogen
Chronic inflammation of the intestines is one of the main enemies of the healthy bowel-brain axis. The strongest natural antioxidant that science has been researching intensively in the last decade is Molecular hydrogen (H₂). Product Hydrox by Neuronwell It enriches the water with molecular hydrogen and helps to neutralize free radicals right at the site of inflammation.
Product: Hydrox by Neuronwell6. Research and Science: What do studies say?
In the last 10 years, the field of research of the intestine-brain axis has been one of the fastest growing fields of medicine. Here are the key insights:
The study showed that germ-free mice (without a medium microbiome) show symptoms similar to autism — social isolation and repetitive behavior. After the microbiome was restored, the symptoms eased.
Research has shown that a medium microbiome transplant from children with ASD caused autistic symptoms in laboratory mice — and vice versa.
A meta-analysis of 18 studies confirmed that interventions focused on the microbiome led to a statistically significant improvement in gastrointestinal symptoms and behavior in children with ASD.
Scientific works repeatedly confirm that molecular hydrogen reduces inflammatory markers and oxidative stress in neurological tissue.
7. Summary: What to take away from this article
The axillo-brain axis is not a fashionable buzzword — it is a real physiological system whose condition fundamentally affects your health, mood and performance. And for children with ASD, her care is especially important.
- The intestine and brain are connected through the nervous, hormonal and immune systems.
- The intestinal microbiome produces most of serotonin and directly affects the psyche.
- Children with ASD have a statistically different microbiome and a significantly higher incidence of moderate problems.
- Microbiome care is available, natural and brings measurable results.
- Quality water, detox, herbs and antioxidants are the basic pillars of the healthy gut-brain axis.
Do you want to start caring for the gut-brain axis?
View our products designed specifically to support the gut-brain axis: Gutox, Gutherb, Mumio, Acerola, Hydrox and Distiller. You can find the entire assortment at shop.neuronwell.com
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