When we think about feeding babies, it's easy to focus on nutrients like iron, healthy fats and protein. While these are incredibly important, there's another part of the puzzle that's often overlooked—the gut microbiome.
Your baby's gut is home to trillions of bacteria that play a vital role in digestion, immune development, nutrient absorption and future health. In fact, the first 1,000 days of life are considered one of the most important windows for shaping a resilient and diverse microbiome.
The foods we introduce during this time can help nourish these beneficial bacteria and lay the foundations for a healthy gut for years to come. Breastmilk is an important part to this development but we actually see in the research that it’s when solid food is introduced that the microbes really develop.
What Makes a Meal Gut Friendly?
Rather than thinking about individual "superfoods", a gut-friendly meal combines a few key elements that work together.
Fibre: Food for Good Gut Bugs
Although babies don't digest fibre themselves, their gut bacteria absolutely love it.
Different types of fibre feed different bacterial species, helping to build a more diverse microbiome. As these bacteria ferment fibre, they produce compounds called short-chain fatty acids (particularly butyrate), which help:
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Support the gut lining
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Reduce inflammation
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Strengthen the immune system
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Nourish the cells of the colon
Some excellent fibre-rich foods for babies include:
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Pumpkin
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Kumara
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Beetroot
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Broccoli
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Carrots
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Avocado
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Pear
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Apple
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Lentils
Anything that comes from a plant will contain fibre! Fibre creates the structure for the plant much like bones create our form and structure. The key is variety. Offering a wide range of plant foods over time exposes your baby to many different fibres that feed different microbes.
Resistant Starch: A Hidden Gem
One of the most exciting foods for the microbiome is resistant starch.
As the name suggests, this starch "resists" digestion in the small intestine - much like fibre does - and instead travels to the large intestine, where beneficial bacteria ferment it.
Great baby-friendly sources include:
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Cooked and cooled potatoes
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Cooked and cooled rice
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Cooked and cooled pasta
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Green/ripe bananas
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Oats
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Legumes - lentils, black beans, chickpeas..
You don't need to serve these foods cold. Once they've been cooked and cooled, they can be gently reheated without losing all of their resistant starch.
Polyphenols: Plant Compounds That Feed the Microbiome
Many colourful fruits and vegetables contain natural compounds called polyphenols. These act like fertiliser for beneficial bacteria.
Some wonderful baby-friendly options include:
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Blueberries
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Blackberries
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Plums
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Beetroot
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Purple cabbage
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Spinach
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Herbs like parsley and coriander
As you’ll see these foods are all a rich/deep colour which is the key indication of a good polyphenol level.
Meals I Feed my Daughter
When I go to make a meal for my daughter, much like adults, I like to incorporate the following:
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Carb = fibre + often resistant starch
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Non-starchy veg = fibre + polyphenols
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Something fermented = good bacteria
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Protein = blood sugar balance + important building blocks for their growth
Often this ends up being some of our leftovers or a random meal made from bits in the fridge! Perfection is not the key but just focusing on getting in variety and trying different foods every week.
She is now 10 months old but all of these foods I introduced quite early on with the aim to expose her to lots of foods and textures.
Chicken, Kumara, Kraut & Broccoli Mash
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I tend to roast a whole chicken every week to use for our lunches
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I’ll boil or roast some kumara and broccoli at the same time
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I don’t tend to fully mash/puree this as I like there to be texture for her to chew on
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I divide this up in muffin trays and freeze so that I have lots of portions for the week
Slow-Cooked Beef with Pumpkin & Lentils
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We often have a slow cooked beef meal at least once a week so I set some of the meat aside for Freida. Even though this recipe will typically have tinned tomatoes, spices, onions, garlic, bone broth etc she loves it and I love knowing there is lots of variety in it
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Tinned lentils are a great way to add in variety and are really easy for them to eat. A nice source of resistant starch
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Pumpkin is a lovely vegetable for babies and they seem to love it
Chia pudding with beet kvass & stewed pear
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I’ll often make the chia pudding with coconut yoghurt so that there’s a probiotic component. I also mix in the Clover Ferments here!
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Stewed pear - largely because we have a couple of pears trees and I always bottle a lot! Pears contain great prebiotic fibres like pectin so are a nice gut friendly option and babies tend to love them. I simply stew them in water and cinnamon.
Liver, Rice & Edamame beans
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Liver is such an excellent food for babies - easy to eat and packed with so many nutrients! I think it should be a first food for all babies. You can mash it up, make it into pate or just give them little strips to suck on
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Rice is easy to introduce early on and provides a nice resistant starch element once cooked and cooled
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Edamame beans give a different type of fibre and have a good protein amount too
Scrambled Eggs & Kiwifruit
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Most mornings Freida will have scrambled eggs and absolutely loves them!
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I like to give her a kiwifruit afterwards in a few segments - skin on - for her to suck away at. This provides lots of nice fibre alongside the eggs that don’t have any fibre.
When Can Babies Try Fermented Foods?
One of the most common questions parents ask is whether fermented foods are safe for babies.The answer is yes—for most babies, fermented foods can be introduced once solids are established, usually from around six months of age, provided they are developmentally ready.
Fermented foods introduce beneficial microbes alongside organic acids and fermentation by-products that support microbial diversity and a healthy gut.
The key is to start small. Think of ferments as a condiment rather than a main food. A teaspoon of live sauerkraut brine mixed through vegetables, or a tiny amount of finely chopped sauerkraut served alongside a meal, is often plenty to begin with.
Easy Ways to Introduce Ferments
Try:
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Mixing kvass into their water bottle
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Stirring a teaspoon of sauerkraut brine through mashed vegetables.
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Mixing finely chopped fermented vegetables into avocado mash.
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Serving tiny pieces alongside scrambled eggs.
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Mixing into soups once cooled slightly (avoid boiling live ferments).
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Adding to rice bowls or slow-cooked meats.
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Mixing Clover Ferments into yoghurt or chia pudding or a smoothie
A Few Things to Remember
Building a healthy gut isn't about finding one perfect food.
It's the combination of:
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Lots of different plant foods
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Fibre-rich vegetables and fruit
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Resistant starches
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Quality proteins
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Fermented foods in small, regular amounts
Over time, these foods work together to encourage a thriving microbiome that supports digestion, immunity and overall health.
Small choices made every day can have a lasting impact on your baby's gut—and their health for years to come.
