A Broth & Co guide to the developing gut microbiome, the gut-brain axis, family nutrition, sleep, stress resilience and everyday wellbeing.

Key takeaways Children's mood, behaviour, sleep and development are shaped by many factors. The gut microbiome may be one part of that picture because the gut, immune system and brain are constantly communicating. No food can control a child's behaviour or development, but a varied whole-food routine with protein, fibre-rich plants, fermented foods where tolerated, fluids, sleep, outdoor play and predictable family meals can support overall wellbeing.

 

Children Are Developing Ecosystems

Parents often notice when something feels different: a child is more emotional, unsettled, tired, distracted, hungry, uncomfortable or not quite themselves. It is natural to wonder whether food, digestion, sleep or stress may be involved.

The careful answer is that childhood wellbeing is never explained by one system. Children are growing bodies, developing brains, changing immune systems and learning nervous systems, all wrapped inside family life. The gut microbiome is one part of that bigger picture.

A useful mental model is this: a child is not a machine with separate parts. A child is a developing ecosystem. Food, sleep, movement, relationships, microbes, hormones and immune signals are constantly interacting. That does not mean every mood or behaviour starts in the gut. It means the gut is one of the body's important conversation centres.

This guide sits alongside broader family nutrition articles such as Children's Nutrition: Building Healthy Eating Habits for Life and Nutrition Across the Lifespan: From Childhood to Healthy Ageing.

What Is the Gut Microbiome?

The gut microbiome refers to the bacteria, fungi, viruses and other microorganisms that naturally live in the digestive tract. These microbes are not just passengers. They interact with food, produce metabolites, help shape the gut environment and communicate with the immune system.

Microbiome role	What it means for families
Digestion	Gut microbes interact with fibres, resistant starches and plant compounds that humans do not fully digest on their own.
Metabolites	Microbes can produce compounds such as short-chain fatty acids when they ferment certain fibres.
Immune education	The gut is a major meeting place between food, microbes and immune cells.
Barrier support	The intestinal lining helps separate the gut contents from the inside of the body.
Communication	The gut communicates with the brain through nervous, immune, hormonal and metabolic pathways.

 

The microbiome begins developing early in life and continues to change throughout childhood. Feeding patterns, family foods, environment, pets, siblings, infections, medicines, sleep, stress and many other factors can all influence microbial patterns.

Your Child’s Gut Microbiome Starts at the Dinner Table: How Everyday Foods Help Shape Gut Health explores this family-food foundation in more detail.

The Gut-Brain Axis: A Two-Way Conversation

The gut-brain axis is the communication network linking the digestive system and the brain. It involves the nervous system, immune system, gut hormones, microbial metabolites and the vagus nerve.

This is one of those biology moments that makes the body suddenly click: the gut and brain are not having a one-way conversation. They are talking back and forth. Stress can affect digestion. Digestive discomfort can affect mood and attention. Sleep can influence appetite and gut rhythms. Food can influence the microbial environment.

The Gut–Brain Axis Explained: The Communication Network Linking Digestion and Brain Health and The Vagus Nerve Explained: The Communication Highway Between Your Gut and Brain explain the wider biology.

Did you know? The gut produces and responds to many signalling molecules. Some neurotransmitters and their precursors are involved in both digestive and nervous system communication, but this does not mean the gut simply controls mood. It means the body uses shared chemistry across different systems.

 

Neurotransmitters and Gut Health | Understanding the Gut-Brain Axis is a useful next read for this topic.

Early Childhood Is a Sensitive Window

The early years are a period of remarkable growth. Neural connections form rapidly. Immune responses learn. Sleep patterns mature. Children move from milk feeding to a wider range of family foods. The gut microbiome also becomes more complex and gradually more stable.

This overlap is why researchers are interested in the gut microbiome during childhood. It does not mean the microbiome determines a child's personality, intelligence or behaviour. Development is shaped by genetics, pregnancy, birth, feeding, family environment, relationships, learning, play, sleep, movement and healthcare as well as microbial ecology.

The most useful parent takeaway is not to chase a perfect microbiome. It is to build the everyday conditions that support a growing child: regular meals, enough protein, colourful plant foods, calm routines, sleep, movement, hydration and a relaxed approach to eating.

Healthy Eating Habits Start Early: Why Childhood Nutrition Shapes Lifelong Health and How Children's Eating Habits Change as They Grow: What Parents Should Know support that practical view.

How Gut Microbes May Influence Brain Development

Researchers are exploring several pathways that may connect gut microbes with brain development. Much of the mechanistic evidence comes from animal studies, while human research is still developing. That distinction matters. It keeps the science interesting without overstating what parents can control.

Pathway	What researchers are exploring
Immune signalling	Gut microbes interact with immune cells, and immune signals can influence brain and body communication.
Short-chain fatty acids	Certain fibres can be fermented into compounds such as acetate, propionate and butyrate, which are being studied for their roles in gut and immune biology.
Vagus nerve signalling	The vagus nerve is one route through which gut and brain information may travel.
Stress response systems	The gut microbiome may interact with the HPA axis, one of the body's major stress response systems.
Nutrient availability	Digestion and absorption influence the nutrients available for growth, neurotransmitter pathways, energy metabolism and development.

 

Short-Chain Fatty Acids Explained: How Your Gut Microbes Turn Fibre into Health-Supporting Compounds explains one of the most important microbial metabolite families.

Mood, Behaviour and the Microbiome: What We Can Say Carefully

Research has reported associations between gut microbial patterns and aspects of mood, temperament, sleep and behaviour. These findings are interesting, but they do not prove that changing the microbiome will change a child's behaviour.

For families, the practical point is gentler and more useful: gut comfort, regular meals, sleep, movement, stable routines and nourishing food all help create the conditions for children to feel and function well. If a child is tired, hungry, constipated, uncomfortable or highly stressed, behaviour may look different because the whole body is under load.

Parent-friendly perspective Food can support children. It should not become another way to blame parents or pressure children. A child's behaviour is not a report card on the family diet. It is information from a growing body and brain.

 

The Gut–Brain–Mood Connection Explained and Why Whole Foods Feed Both Your Gut and Brain continue this topic for readers who want the wider science.

The Stress Response System and Gut Health

The HPA axis helps regulate stress responses and adaptation. In children, stress biology is influenced by sleep, safety, relationships, routines, physical activity, food intake and developmental stage.

A child does not need a complicated wellness routine. Most children benefit from simple repeatable rhythms: meals that arrive before they are ravenous, time outside, movement, a predictable evening routine and enough sleep.

Daily habit	How it may support wellbeing
Regular meals and snacks	Help reduce long gaps between eating and support stable family routines.
Protein at meals	Supports growth, development, satiety and overall nutrition.
Plant diversity	Provides different fibres and plant compounds for the gut environment.
Outdoor play	Supports movement, daylight exposure, social play and sleep pressure.
Consistent bedtime routine	Helps children transition into sleep and supports restorative processes.
Calm mealtimes	Help children learn food skills without pressure.

 

Nutrition for Stress Resilience: 10 Foods That Support Mood, Focus & Nervous System Health offers a broader nutrition view.

Sleep, Glycine and Evening Routines

Sleep is one of the most important foundations for childhood development. During sleep, the body carries out processes involved in growth, memory, immune function, emotional regulation and recovery from the day.

Bone broth is sometimes discussed in relation to evening routines because it contains collagen-derived amino acids, including glycine. Glycine is being studied for its role in relaxation, nervous system function and sleep physiology. Bone broth is not a sleep treatment, but it can be included as one nourishing food within a calm evening meal pattern.

·       A warm cup of broth with dinner

·       Bone broth stirred into soup

·       Broth mixed into mashed vegetables

·       A nourishing evening meal with protein, vegetables and healthy fats

Glycine: Recovery, Relaxation, Sleep & the Collagen Connection explains glycine in more detail, and Functional Hydration places savoury fluids within everyday hydration.

Gut Barrier Function and Immune Communication

The digestive tract is a selective barrier. It allows nutrients to be absorbed while helping separate gut contents from the inside of the body. Researchers continue to investigate how intestinal barrier function, immune signalling and microbial metabolites interact.

For parents, this does not need to become a technical project. The everyday foundations remain familiar: varied whole foods, adequate protein, fibre-rich plants, fluids, sleep, movement and medical care when symptoms need attention.

Leaky Gut, Intestinal Permeability & Gut Barrier Function: The Complete Guide and The Gut–Immune–Brain Connection Explained explain the broader gut barrier and immune communication story.

Where Bone Broth Fits for Families

Bone broth can be a practical family food because it helps turn simple ingredients into warm meals. It can be used in soups, stews, sauces, rice, noodles, mashed vegetables and savoury drinks.

A serve of Broth & Co bone broth provides approximately 5 g of naturally occurring protein together with collagen-derived amino acids such as glycine, proline and glutamine. It should be viewed as one food within a balanced diet, not as a treatment for mood, behaviour, sleep or digestive concerns.

Bone Broth Benefits: The Complete Guide to Gut Health, Protein, Recovery & Healthy Ageing and Bone Broth Recipe: How to make & More explain the broader bone broth foundation.

Broth & Co's adult digestive wellbeing research is summarised in Bone Broth Clinical Study: Digestive Wellbeing & Intestinal Permeability Research | Broth & Co. That study was conducted in adults, so it should not be presented as child-specific evidence.

Beefy Bone Broth Powder (Traditional Blend) can be used as a convenient broth base for family cooking.

Building a Healthy Gut Microbiome in Children

There is no single food or supplement that creates gut health. The strongest strategy is a pattern families can repeat most weeks.

·       Include different plant foods across the week: vegetables, fruit, legumes, herbs, whole grains, nuts and seeds where age-appropriate.

·       Use fermented foods where tolerated, such as natural yoghurt, kefir, miso or small amounts of sauerkraut.

·       Include protein foods such as eggs, fish, meat, poultry, legumes, tofu, dairy or other suitable options.

·       Make fluids easy: water, milk where appropriate, soups and savoury broth-based meals.

·       Keep mealtimes low-pressure so children can learn to try foods gradually.

Gut Health Is Not Just About Probiotics: Why Feeding Your Microbiome Matters, Gut Microbes Feed on Fibre: Why Diversity Matters More Than One Superfood and Building a Healthy Plate for Children: A Simple Guide to Balanced Family Meals support this food-first approach.

Kid-Friendly Gut Health Ideas

Hidden Vegetable Bone Broth Soup

Serves 4

A smooth soup for children who prefer a softer texture or are still learning to enjoy visible vegetables.

Ingredients

·       4 cups prepared Broth & Co bone broth

·       1 carrot, diced

·       1 zucchini, diced

·       1 cup pumpkin, diced

·       1/2 cup cauliflower florets

·       1 tablespoon olive oil

·       1/2 cup cooked chicken or white beans, optional

·       Sea salt, to taste for older children and adults

Method

Step 1: Warm olive oil in a saucepan over medium heat.

Step 2: Add carrot, zucchini, pumpkin and cauliflower and cook for 3 minutes.

Step 3: Pour in prepared bone broth and bring to a gentle simmer.

Step 4: Cook for 15-18 minutes, or until the vegetables are soft.

Step 5: Add chicken or white beans if using.

Step 6: Blend until smooth, season lightly if appropriate and serve warm.

Why it works

This recipe uses broth as a savoury base and blends vegetables into a smooth, familiar texture.

Green Eggs With Spinach

Serves 2

A gentle way to include greens at breakfast without making the meal feel unfamiliar.

Ingredients

·       4 eggs

·       1/2 cup baby spinach, finely chopped

·       1 tablespoon milk or water

·       1 teaspoon olive oil or butter

·       1 tablespoon grated cheese, optional

·       Toast, avocado or tomatoes, to serve

Method

Step 1: Whisk eggs with milk or water.

Step 2: Stir through finely chopped spinach.

Step 3: Warm olive oil or butter in a small pan over low-medium heat.

Step 4: Add the egg mixture and cook gently, stirring until softly set.

Step 5: Add cheese if using and serve with toast, avocado or tomatoes.

Why it works

Eggs provide protein while spinach adds colour and a small repeated exposure to greens.

Pink Berry Milk

Serves 1

A colourful drink that can be used as a snack alongside a balanced meal pattern.

Ingredients

·       1 cup milk of choice

·       1/2 cup frozen strawberries or mixed berries

·       1/4 small cooked beetroot or 1 teaspoon beetroot powder, optional

·       1 tablespoon Greek yoghurt or coconut yoghurt, optional

·       1 teaspoon chia seeds, optional for older children

Method

Step 1: Add milk, berries, beetroot if using, yoghurt and chia seeds to a blender.

Step 2: Blend until smooth.

Step 3: Taste and adjust thickness with extra milk if needed.

Step 4: Serve immediately.

Why it works

This keeps the focus on colour, whole foods and a fun format rather than pressure to eat a particular vegetable.

Chicken and Vegetable Broth Bowl

Serves 2

A simple family meal that can be adapted to each child's appetite and texture preference.

Ingredients

·       3 cups prepared bone broth

·       1 cup cooked shredded chicken

·       1/2 cup cooked rice or small pasta

·       1 carrot, finely diced

·       1/2 cup peas or corn

·       1 handful baby spinach, finely chopped

·       Fresh parsley, optional

Method

Step 1: Add bone broth and carrot to a saucepan.

Step 2: Simmer for 8-10 minutes, or until the carrot is soft.

Step 3: Add chicken, rice or pasta, peas or corn and spinach.

Step 4: Warm for 3-4 minutes until everything is hot.

Step 5: Serve in bowls with parsley for older children and adults if desired.

Why it works

This combines fluid, protein, vegetables and familiar carbohydrates in one warm bowl.

Healthy Kids Recipes with Hidden Vegetables, The Healthy Kids Kitchen: 25 Family-Friendly Whole-Food Recipes Kids Will Actually Eat and 7-Day Healthy Family Meal Plan offer more family-friendly meal ideas.

Frequently Asked Questions

Can gut health affect children's behaviour?

Researchers are exploring links between the gut microbiome, immune signalling, stress responses, mood and behaviour. Behaviour is influenced by many factors, so gut health should be viewed as one part of the picture.

What foods support a healthy gut microbiome in children?

A varied diet with vegetables, fruit, legumes, whole grains where tolerated, fermented foods, protein foods and enough fluids can support overall dietary quality and the gut environment.

Is bone broth suitable for children?

Bone broth can be included as part of a balanced family diet where it suits the child and family. It provides naturally occurring protein and collagen-derived amino acids, and works well in soups, sauces and cooked meals.

What is the gut-brain axis?

The gut-brain axis is the communication network linking the digestive system and the brain through nerves, immune signals, hormones and microbial metabolites.

Do probiotics fix gut health?

Not necessarily. Probiotic effects are strain-specific and context-specific. For most families, the everyday foundation is feeding the microbiome with varied whole foods and fibre-rich plants.

When should parents seek help?

Persistent digestive symptoms, poor growth, blood in stools, severe pain, ongoing sleep problems, major behavioural changes or developmental concerns should be discussed with a qualified health professional.

Summary

The gut-brain connection in children is a fascinating and evolving area of research. The gut microbiome may interact with the developing brain through immune signals, microbial metabolites, stress pathways, the vagus nerve and nutrient availability.

For families, the most useful message is practical rather than perfectionist. Children do not need a perfect microbiome. They need supportive routines: enough food, enough sleep, enough movement, enough connection and enough variety over time.

A food-first routine with colourful plants, protein, fermented foods where tolerated, fluids and family meals can support the whole child. Bone broth can be one warm, savoury tool within that pattern, especially when it helps make soups, vegetables and simple meals easier to prepare.

Good Health Starts on Your Plate, A Well-Stocked Kitchen Is the Secret to Healthy Eating: Effortless Hacks, Smart Staples & Bone Broth Recipes and collection of nourishing recipes are useful next steps for families.