When we hear the word microbiome, we might think it has little to do with the brain, less to do with us as we eat three meals a day, and in the current climate even run for the hills as it’s such an overused term these days. But what if we told you that trillions of tiny microbes in your gut are having regular conversations with your mind through what is called the gut-brain connection? And these conversations are shaping your very experience of the world around you.
If you or someone you care about is neurodivergent you might already be familiar with the importance of mental wellbeing. What’s less well known is the surprising role your gut health plays in influencing mood, anxiety and even aspects of personality.
Let’s look at how the gut-brain connection works, what the science says and most importantly, what you can do to support better gut health and emotional balance.
What is the gut microbiome?
Your gut microbiome is a vast ecosystem of bacteria, fungi and other microbes living in your digestive tract. Think of it as a support system, a community of organism set up to help digest food, fight off harmful invaders and even make important brain chemicals like serotonin, the “feel-good” neurotransmitter.
For neurodivergent minds, this gut-brain connection can be especially important. That’s because the balance of microbes in the gut can directly affect how the brain regulates stress, mood and sensory processing.
How gut diversity influences mental health
Scientific research is increasingly showing that a diverse gut microbiome is linked to better mental health and that poor diversity is associated with anxiety, low mood and even socially derived behaviours.
What the research says:
- Mood and Anxiety:
A 2019 review in General Psychiatry found strong evidence that gut microbiota impacts central nervous system function, especially in regulating mood and anxiety. Probiotics and dietary changes showed promise in reducing symptoms of depression and anxiety in some participants. (Yang et al., 2019) - Autism Spectrum Disorder (ASD):
Studies have found differences in the gut microbiome of autistic individuals compared to neurotypical peers. For example, lower microbial diversity and an imbalance of certain bacteria have been associated with both gastrointestinal and behavioural symptoms. (Kang et al., 2013) - Personality and Social Traits:
A study in Human Microbiome Journal suggested that gut microbes may shape traits like sociability and openness to experience by influencing brain chemistry and the immune system. (Johnson & Foster, 2018)
Why neurodivergent people may be more affected
Neurodivergent individuals often experience heightened sensitivity to food textures, tastes and colours which impacts their interaction with food and the choices they make, leading to a less diverse diet. This combined with a propensity toward chronic stress, or irregular sleep can throw the gut ecosystem out of balance.
How to support a healthier gut microbiome
The good news is that our gut microbiome is very responsive to lifestyle changes, especially what we eat. Here are some simple steps you can take to encourage a more diverse, thriving gut microbiome:
- Eat more plant-based variety
- Aim for 30 different plant foods per week (vegetables, fruits, legumes, nuts, seeds, herbs and whole grains).
- Each type offers different fibres and nutrients that feed different microbes.
- Include fermented foods
- Try adding small amounts of yogurt, kefir, sauerkraut, kimchi or miso to your meals.
- These contain live bacteria that can help rebalance your microbiome.
- Feed the good bacteria
- Prebiotic foods like bananas, garlic, leeks, asparagus and oats act like fertiliser for helpful gut bugs.
- Stay hydrated
- Drinking plenty of water helps digestion and supports the gut lining.
- Reduce stress (As much as you can)
- Chronic stress can disrupt gut health. Simple practices like deep breathing, nature walks or gentle stretching can help.
- Prioritise sleep
- The gut microbiome follows a circadian rhythm, just like you do. A regular sleep pattern helps it function properly.
- Limit ultra-processed foods
- Fast food, sugary snacks and artificial additives can reduce gut diversity and promote harmful bacteria.
Why texture matters
Studies, such as those by Bandini et al. (2010), have shown that children with autism often reject foods based on texture, smell or appearance, leading to restricted diets and potential gut microbiome imbalances. (Bandini et al., 2010, Journal of the American Dietetic Association) this will continue into adulthood as habits, fears and even phobias develop.
Yet, as we have read, a varied plant-based diet is crucial for a healthy gut, as outlined by the American Gut Project, which found that people who eat 30+ plant types per week have the most diverse microbiomes. (McDonald et al., 2018, mSystems)
So how do we close the gap? Here are 7 texture-aware tips to boost gut diversity
- Blend or purée vegetables into smooth textures
If crunchy or fibrous textures are difficult:
- Add spinach, avocado or carrots into fruit smoothies.
- Blend cooked lentils or beans into soups or dips.
- Try roasted and blended cauliflower as a base for sauces.
Why it helps: Keeps the fibre intact while reducing texture triggers. Soluble fibre feeds beneficial gut bacteria.
- Make texture-tolerable fibre snacks
Bake high-fibre muffins, pancakes or waffles using:
- Oat flour, grated zucchini, mashed banana, flaxseed and chia.
Support: Chia and flax are prebiotic-rich and promote beneficial short-chain fatty acid production. (Slavin, 2013)
- Sneak in gut-friendly ingredients
Try:
- Stirring ground nuts or seeds into sauces or yogurt.
- Using pureed beans in brownie or cake recipes.
Support: Legumes and seeds feed Bifidobacteria and Lactobacillus strains, supporting better digestion and mental health. (Gibson et al., 2017, The Lancet)
- Fermented foods in hidden forms
If the texture or tang of fermented foods is off-putting:
- Stir plain kefir into a fruit smoothie.
- Use blended sauerkraut juice as part of a dressing or broth.
- Mix a small amount of miso paste into soups or sauces.
Support: Fermented foods introduce helpful microbes that may regulate brain signalling and reduce anxiety. (Zheng et al., 2020, Frontiers in Neuroscience)
In Summary
The gut-brain connection is more than just a trend, it’s a growing area of science with real implications for mood, behaviour and wellbeing, especially for neurodivergent people. While there’s no one-size-fits-all solution, improving gut microbiome diversity is a powerful and natural way to support emotional and cognitive health.
Start small, be curious and listen to your body. The tiny microbes in your gut are some of your biggest allies.
If you want to hear more from us, please do get in touch. We’d love to chat.
Resources & Further Reading:
- Yang, B., et al. (2019). Psychiatric disorders and gut microbiota: What is the link? General Psychiatry.
- Kang, D. W., et al. (2013). Reduced incidence of Prevotella and other fermenters in intestinal microflora of autistic children. PLoS ONE.
- Johnson, K. V., & Foster, K. R. (2018). Why does the microbiome affect behavior? Human Microbiome Journal.